{"id":91006,"date":"2026-10-29T08:00:00","date_gmt":"2026-10-29T08:00:00","guid":{"rendered":"https:\/\/360carseats.com\/?page_id=91006"},"modified":"2026-11-08T00:52:24","modified_gmt":"2026-11-07T16:52:24","slug":"booster-car-seats","status":"publish","type":"page","link":"https:\/\/360carseats.com\/ja\/booster-car-seats\/","title":{"rendered":"Booster Car Seats Manufacturer &#038; Supplier"},"content":{"rendered":"<style>* { box-sizing: border-box; } body {margin: 0;}body{margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;line-height:inherit;}#preview-root{min-height:100vh;max-width:100%;}*, ::before, ::after{--tw-border-spacing-x:0;--tw-border-spacing-y:0;--tw-translate-x:0;--tw-translate-y:0;--tw-rotate:0;--tw-skew-x:0;--tw-skew-y:0;--tw-scale-x:1;--tw-scale-y:1;--tw-scroll-snap-strictness:proximity;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-color:rgb(59 130 246 \/ 0.5);--tw-ring-offset-shadow:0 0 #0000;--tw-ring-shadow:0 0 #0000;--tw-shadow:0 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!important;transition-behavior:normal !important;transition-duration:0s !important;transition-timing-function:ease !important;transition-delay:0s !important;transition-property:none !important;}.apro-card, .apro-card img{transition-behavior:normal !important;transition-duration:0s !important;transition-timing-function:ease !important;transition-delay:0s !important;transition-property:none !important;transform:none !important;}}@media (min-width: 640px){.sm:w-auto{width:auto;}.sm:grid-cols-2{grid-template-columns:repeat(2, minmax(0px, 1fr));}.sm:flex-row{flex-direction:row;}.sm:items-center{align-items:center;}.sm:px-6{padding-left:1.5rem;padding-right:1.5rem;}.sm:py-24{padding-top:6rem;padding-bottom:6rem;}.sm:text-2xl{font-size:1.5rem;line-height:2rem;}.sm:text-4xl{font-size:2.25rem;line-height:2.5rem;}.sm:text-5xl{font-size:3rem;line-height:1;}.sm:text-base{font-size:1rem;line-height:1.5rem;}.sm:text-lg{font-size:1.125rem;line-height:1.75rem;}.sm:text-xl{font-size:1.25rem;line-height:1.75rem;}[class~=\"sm:flex-row\"]{flex-direction:row;}[class~=\"sm:grid-cols-2\"]{grid-template-columns:repeat(2, minmax(0px, 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1fr));}.md:flex-row{flex-direction:row;}.md:justify-end{justify-content:flex-end;}.md:border-l-0{border-left-width:0px;}.md:border-r-2{border-right-width:2px;}.md:p-10{padding-top:2.5rem;padding-right:2.5rem;padding-bottom:2.5rem;padding-left:2.5rem;}.md:p-12{padding-top:3rem;padding-right:3rem;padding-bottom:3rem;padding-left:3rem;}.md:p-4{padding-top:1rem;padding-right:1rem;padding-bottom:1rem;padding-left:1rem;}.md:p-8{padding-top:2rem;padding-right:2rem;padding-bottom:2rem;padding-left:2rem;}.md:px-8{padding-left:2rem;padding-right:2rem;}.md:py-20{padding-top:5rem;padding-bottom:5rem;}.md:pl-0{padding-left:0px;}.md:pr-4{padding-right:1rem;}.md:text-right{text-align:right;}.md:text-2xl{font-size:1.5rem;line-height:2rem;}.md:text-3xl{font-size:1.875rem;line-height:2.25rem;}.md:text-4xl{font-size:2.25rem;line-height:2.5rem;}.md:text-base{font-size:1rem;line-height:1.5rem;}.md:text-lg{font-size:1.125rem;line-height:1.75rem;}.md:text-sm{font-size:0.875rem;line-height:1.25rem;}.md:text-xl{font-size:1.25rem;line-height:1.75rem;}[class~=\"md:mb-16\"]{margin-bottom:4rem;}[class~=\"md:w-3\/4\"]{width:75%;}[class~=\"md:w-auto\"]{width:auto;}[class~=\"md:grid-cols-2\"]{grid-template-columns:repeat(2, minmax(0px, 1fr));}[class~=\"md:grid-cols-3\"]{grid-template-columns:repeat(3, minmax(0px, 1fr));}[class~=\"md:flex-row\"]{flex-direction:row;}[class~=\"md:justify-end\"]{justify-content:flex-end;}[class~=\"md:p-10\"]{padding-top:2.5rem;padding-right:2.5rem;padding-bottom:2.5rem;padding-left:2.5rem;}[class~=\"md:px-8\"]{padding-left:2rem;padding-right:2rem;}[class~=\"md:py-20\"]{padding-top:5rem;padding-bottom:5rem;}[class~=\"md:text-2xl\"]{font-size:1.5rem;line-height:2rem;}[class~=\"md:text-4xl\"]{font-size:2.25rem;line-height:2.5rem;}[class~=\"md:text-base\"]{font-size:1rem;line-height:1.5rem;}[class~=\"md:text-lg\"]{font-size:1.125rem;line-height:1.75rem;}[class~=\"md:border-l-0\"]{border-left-width:0px;}[class~=\"md:border-r-2\"]{border-right-width:2px;}[class~=\"md:col-span-2\"]{grid-column-start:span 2;grid-column-end:span 2;}[class~=\"md:mb-20\"]{margin-bottom:5rem;}[class~=\"md:mt-16\"]{margin-top:4rem;}[class~=\"md:p-12\"]{padding-top:3rem;padding-right:3rem;padding-bottom:3rem;padding-left:3rem;}[class~=\"md:p-4\"]{padding-top:1rem;padding-right:1rem;padding-bottom:1rem;padding-left:1rem;}[class~=\"md:p-8\"]{padding-top:2rem;padding-right:2rem;padding-bottom:2rem;padding-left:2rem;}[class~=\"md:pl-0\"]{padding-left:0px;}[class~=\"md:pr-4\"]{padding-right:1rem;}[class~=\"md:text-3xl\"]{font-size:1.875rem;line-height:2.25rem;}[class~=\"md:text-right\"]{text-align:right;}[class~=\"md:text-sm\"]{font-size:0.875rem;line-height:1.25rem;}[class~=\"md:text-xl\"]{font-size:1.25rem;line-height:1.75rem;}[class~=\"md:w-1\/4\"]{width:25%;}}@media (min-width: 1024px){.lg:col-span-1{grid-column-start:span 1;grid-column-end:span 1;}.lg:col-span-5{grid-column-start:span 5;grid-column-end:span 5;}.lg:col-span-7{grid-column-start:span 7;grid-column-end:span 7;}.lg:w-1\/2{width:50%;}.lg:w-auto{width:auto;}.lg:grid-cols-12{grid-template-columns:repeat(12, minmax(0px, 1fr));}.lg:grid-cols-2{grid-template-columns:repeat(2, minmax(0px, 1fr));}.lg:grid-cols-3{grid-template-columns:repeat(3, minmax(0px, 1fr));}.lg:grid-cols-4{grid-template-columns:repeat(4, minmax(0px, 1fr));}.lg:flex-row{flex-direction:row;}.lg:gap-12{row-gap:3rem;column-gap:3rem;}.lg:gap-16{row-gap:4rem;column-gap:4rem;}.lg:gap-20{row-gap:5rem;column-gap:5rem;}.lg:px-8{padding-left:2rem;padding-right:2rem;}.lg:py-24{padding-top:6rem;padding-bottom:6rem;}.lg:py-32{padding-top:8rem;padding-bottom:8rem;}.lg:text-4xl{font-size:2.25rem;line-height:2.5rem;}.lg:text-6xl{font-size:3.75rem;line-height:1;}[class~=\"lg:col-span-5\"]{grid-column-start:span 5;grid-column-end:span 5;}[class~=\"lg:col-span-7\"]{grid-column-start:span 7;grid-column-end:span 7;}[class~=\"lg:grid-cols-12\"]{grid-template-columns:repeat(12, minmax(0px, 1fr));}[class~=\"lg:grid-cols-2\"]{grid-template-columns:repeat(2, minmax(0px, 1fr));}[class~=\"lg:grid-cols-4\"]{grid-template-columns:repeat(4, minmax(0px, 1fr));}[class~=\"lg:flex-row\"]{flex-direction:row;}[class~=\"lg:gap-12\"]{row-gap:3rem;column-gap:3rem;}[class~=\"lg:px-8\"]{padding-left:2rem;padding-right:2rem;}[class~=\"lg:py-24\"]{padding-top:6rem;padding-bottom:6rem;}[class~=\"lg:text-6xl\"]{font-size:3.75rem;line-height:1;}[class~=\"lg:col-span-1\"]{grid-column-start:span 1;grid-column-end:span 1;}[class~=\"lg:gap-16\"]{row-gap:4rem;column-gap:4rem;}[class~=\"lg:gap-20\"]{row-gap:5rem;column-gap:5rem;}[class~=\"lg:grid-cols-3\"]{grid-template-columns:repeat(3, minmax(0px, 1fr));}[class~=\"lg:py-32\"]{padding-top:8rem;padding-bottom:8rem;}[class~=\"lg:text-4xl\"]{font-size:2.25rem;line-height:2.5rem;}[class~=\"lg:w-1\/2\"]{width:50%;}[class~=\"lg:w-auto\"]{width:auto;}}<\/style>\n<div id=\"preview-root\">\n<section class=\"relative overflow-hidden w-full bg-cover bg-center bg-no-repeat mb-0 bg-white apro-cat-banner\" style=\"background-image:url(https:\/\/360carseats.com\/wp-content\/uploads\/2026\/11\/holdum-n10-1.webp);max-width: 100%; width: 100%;\"> <img fetchpriority=\"high\" fetchpriority=\"high\" alt=\"Dark grey booster seat on a car rear seat with the three-point belt routed through the red belt guide\" fetchpriority=\"high\" height=\"864\" src=\"https:\/\/360carseats.com\/wp-content\/uploads\/2026\/11\/holdum-n10-1.webp\" width=\"1536\" class=\"absolute inset-0 w-full h-full object-cover\" srcset=\"https:\/\/360carseats.com\/wp-content\/uploads\/2026\/11\/holdum-n10-1-300x169.webp 300w, https:\/\/360carseats.com\/wp-content\/uploads\/2026\/11\/holdum-n10-1-768x432.webp 768w, https:\/\/360carseats.com\/wp-content\/uploads\/2026\/11\/holdum-n10-1-1024x576.webp 1024w, https:\/\/360carseats.com\/wp-content\/uploads\/2026\/11\/holdum-n10-1.webp 1536w, https:\/\/360carseats.com\/wp-content\/uploads\/2026\/11\/holdum-n10-1.webp 1920w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" decoding=\"async\"><\/p>\n<div class=\"absolute inset-0 c272434\"><\/div>\n<div class=\"relative z-10 w-full max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-16 sm:py-24 lg:py-32\">\n<div class=\"max-w-3xl\"> <span class=\"inline-block py-1 px-3 rounded-full text-white text-sm font-semibold tracking-wide uppercase mb-6 bg-[#F5821E]\">OEM &amp; ODM Booster Solutions<\/span> <\/p>\n<h1 class=\"text-4xl sm:text-5xl lg:text-6xl font-extrabold text-white leading-tight mb-6\"> Booster Car Seats Manufacturer &amp; Supplier <\/h1>\n<p class=\"text-lg sm:text-xl text-gray-200 mb-10 leading-relaxed\"> Holdum manufactures booster car seats \u2014 including high-back, harness, and foldable booster seats \u2014 engineered for international safety compliance. Partner with our Jiangsu production facility for ECE R129 production, reliable ISOFIX integration, and scalable wholesale supply across the MY-366 pool. <\/p>\n<div class=\"flex flex-col sm:flex-row gap-4\"> <a href=\"\/contact\/\" class=\"apro-btn apro-btn--primary inline-flex justify-center items-center px-8 py-4 text-base font-semibold transition-colors\"> Request Wholesale Quote <\/a> <a href=\"\/booster-car-seats\/high-back-booster-seat\/\" class=\"apro-btn apro-btn--ghost inline-flex justify-center items-center px-8 py-4 text-base font-semibold transition-colors\"> Explore Booster Models <\/a> <\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"bg-white w-full mb-0 max-w-full\" style=\"max-width: 100%; width: 100%;\">\n<div class=\"w-full max-w-7xl mx-auto px-6 py-16 md:px-8 md:py-20 lg:py-24\">\n<div class=\"grid grid-cols-1 lg:grid-cols-2 gap-12 lg:gap-16 items-center w-full\">\n<div class=\"w-full\"> <span class=\"text-[#2563eb] font-bold uppercase tracking-widest text-sm mb-4 block\">OEM &amp; ODM Manufacturing Partner<\/span> <\/p>\n<h2 class=\"text-3xl sm:text-4xl md:text-4xl font-extrabold text-slate-900 leading-tight mb-8\"> Scalable Booster Seat Supply for Global Child Safety Brands <\/h2>\n<p class=\"text-lg md:text-xl text-slate-600 mb-10 leading-relaxed\"> Holdum engineers high-performance booster car seats that align with evolving international crash-test regulations and brand-specific commercial requirements. From turnkey ECE R129 tooling to customized fabrics and private labeling, our Jiangsu facility streamlines your path from product design to container delivery. <\/p>\n<div class=\"grid grid-cols-1 sm:grid-cols-2 gap-6 w-full\">\n<div class=\"w-full\">\n<h4 class=\"font-bold text-slate-900 text-lg mb-2\">ECE R129 Engineering<\/h4>\n<p class=\"text-slate-600\">Precision side-impact structural engineering and ISOFIX integration ready for regional compliance.<\/p>\n<\/div>\n<div class=\"w-full\">\n<h4 class=\"font-bold text-slate-900 text-lg mb-2\">Flexible B2B Fulfillment<\/h4>\n<p class=\"text-slate-600\">Reliable production schedules, custom soft goods execution, and responsive container-load logistics.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"w-full\">\n<div class=\"relative w-full rounded-2xl overflow-hidden shadow-2xl bg-slate-50\"> <img loading=\"lazy\" loading=\"lazy\" alt=\"Holdum booster car seat engineering and automated manufacturing assembly line\" src=\"https:\/\/360carseats.com\/wp-content\/uploads\/2026\/10\/home-booster-my-366.webp\" class=\"w-full h-auto object-cover\" width=\"722\" height=\"846\" srcset=\"https:\/\/360carseats.com\/wp-content\/uploads\/2026\/10\/home-booster-my-366.webp 722w, https:\/\/360carseats.com\/wp-content\/uploads\/2026\/10\/home-booster-my-366-256x300.webp 256w\" sizes=\"auto, (max-width: 722px) 100vw, 722px\" decoding=\"async\"> <\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"w-full bg-gray-50 mb-0 max-w-full\" style=\"max-width: 100%; width: 100%;\">\n<div class=\"w-full max-w-7xl mx-auto px-6 py-16 md:px-8 md:py-20 lg:py-24\">\n<div class=\"grid grid-cols-1 lg:grid-cols-2 gap-16 items-center w-full\">\n<div class=\"w-full flex flex-col gap-6\"> <span class=\"text-[#2563eb] font-semibold tracking-wide uppercase text-sm\">Commitment to Child Safety<\/span> <\/p>\n<h2 class=\"text-3xl sm:text-4xl md:text-4xl font-bold text-gray-900 leading-tight\"> Reliable Protection for Growing Travelers <\/h2>\n<p class=\"text-lg text-gray-600 leading-relaxed\"> At Holdum, we prioritize precision and safety in every booster seat we manufacture, building upon the proven engineering of our <a href=\"\/360-rotating-car-seats\/\" class=\"hover:underline font-semibold text-[#F5821E]\">360-rotating car seats<\/a>. By integrating ECE R129 standards with robust structural design, we deliver solutions that ensure optimal occupant protection and clear guidance for parents and caregivers on every journey. <\/p>\n<div class=\"grid grid-cols-1 sm:grid-cols-2 gap-6 mt-4 w-full\">\n<div class=\"w-full p-6 bg-white border border-gray-100 rounded-2xl shadow-sm apro-card apro-rv apro-rv-u\">\n<h4 class=\"font-bold text-gray-900 mb-2\">Impact Energy Absorption<\/h4>\n<p class=\"text-sm text-gray-600\">Advanced shell construction designed to effectively manage energy during side-impact scenarios.<\/p>\n<\/div>\n<div class=\"w-full p-6 bg-white border border-gray-100 rounded-2xl shadow-sm apro-card apro-rv apro-rv-u\">\n<h4 class=\"font-bold text-gray-900 mb-2\">Ergonomic Growth Stages<\/h4>\n<p class=\"text-sm text-gray-600\">Adaptive adjustment mechanisms that accommodate changing height requirements from 76 to 150 cm, bridging transition from a <a href=\"\/360-rotating-car-seats\/rotating-convertible-car-seat\/\" class=\"hover:underline font-semibold text-[#F5821E]\">rotating convertible car seat<\/a> to mature vehicle seating.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"w-full\"> <img loading=\"lazy\" loading=\"lazy\" alt=\"Dark grey high-back booster seat in three-quarter view showing deep side wings and an adjustable headrest\" src=\"https:\/\/360carseats.com\/wp-content\/uploads\/2026\/11\/holdum-n13-1-1152x864-1.webp\" class=\"w-full h-auto rounded-3xl shadow-2xl bg-white border border-gray-200 object-cover aspect-[4\/3]\" width=\"1152\" height=\"864\" srcset=\"https:\/\/360carseats.com\/wp-content\/uploads\/2026\/11\/holdum-n13-1-1152x864-1-300x225.webp 300w, https:\/\/360carseats.com\/wp-content\/uploads\/2026\/11\/holdum-n13-1-1152x864-1-768x576.webp 768w, https:\/\/360carseats.com\/wp-content\/uploads\/2026\/11\/holdum-n13-1-1152x864-1-1024x768.webp 1024w, https:\/\/360carseats.com\/wp-content\/uploads\/2026\/11\/holdum-n13-1-1152x864-1.webp 1152w\" sizes=\"auto, (max-width: 1152px) 100vw, 1152px\" decoding=\"async\"> <\/div>\n<\/div>\n<div class=\"mt-20 pt-16 border-t border-gray-200 w-full\">\n<div class=\"grid grid-cols-1 md:grid-cols-3 gap-12 w-full\">\n<div class=\"w-full text-center\">\n<div class=\"text-[#2563eb] text-4xl font-extrabold mb-2\">R129<\/div>\n<h3 class=\"text-gray-900 font-semibold text-lg\">ECE Standards<\/h3>\n<p class=\"text-gray-600 mt-2 text-sm\">Engineered to meet stringent international child safety regulations.<\/p>\n<\/div>\n<div class=\"w-full text-center\">\n<div class=\"text-[#2563eb] text-4xl font-extrabold mb-2\">ISOFIX<\/div>\n<h3 class=\"text-gray-900 font-semibold text-lg\">Secure Installation<\/h3>\n<p class=\"text-gray-600 mt-2 text-sm\">Reinforced ISOFIX and Top Tether points for maximum stability.<\/p>\n<\/div>\n<div class=\"w-full text-center\">\n<div class=\"text-[#2563eb] text-4xl font-extrabold mb-2\">Foldable<\/div>\n<h3 class=\"text-gray-900 font-semibold text-lg\">Design Efficiency<\/h3>\n<p class=\"text-gray-600 mt-2 text-sm\">Space-saving, high-back designs optimized for modern vehicle logistics alongside modular <a href=\"\/convertible-all-in-one-car-seats\/\" class=\"hover:underline font-semibold text-[#F5821E]\">convertible all-in-one car seats<\/a>.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"w-full bg-white text-slate-900 antialiased mb-0 max-w-full\" style=\"max-width: 100%; width: 100%;\">\n<div class=\"w-full max-w-7xl mx-auto px-6 py-16 md:px-8 md:py-20 lg:py-24\">\n<div class=\"w-full flex flex-col items-start gap-4 mb-12 md:mb-16\"> <span class=\"inline-flex items-center px-3.5 py-1 rounded-full text-xs font-semibold uppercase tracking-wider bg-blue-50 text-[#2563eb] border border-blue-100\"> Product Portfolio <\/span> <\/p>\n<h2 class=\"text-3xl sm:text-4xl md:text-4xl w-full font-extrabold tracking-tight text-slate-900\"> Explore Our Core Categories <\/h2>\n<p class=\"w-full text-base sm:text-lg text-slate-600 leading-relaxed\"> Holdum manufactures certified booster car seats for global brands, importers, and retail distributors, offering compliant engineering, turnkey OEM\/ODM customization, and reliable B2B supply. <\/p>\n<\/div>\n<div class=\"w-full grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-8\">\n<div class=\"w-full flex flex-col justify-between rounded-2xl border border-slate-200 bg-slate-50\/50 p-6 md:p-8 transition-all duration-300 hover:shadow-xl hover:border-blue-200 hover:bg-white group apro-card apro-rv apro-rv-u\">\n<div class=\"w-full flex flex-col\">\n<div class=\"w-full overflow-hidden rounded-xl bg-slate-100 mb-6 border border-slate-200\/80 apro-media-wash\"> <img decoding=\"async\" alt=\"High-Back Booster Seat SKU MY-366\" src=\"https:\/\/360carseats.com\/wp-content\/uploads\/2026\/10\/MY-366__MY-366-01-ChatGPT_Image_2026%E5%B9%B46%E6%9C%882%E6%97%A5_12_49_51_2_-transparent.webp\" class=\"w-full h-auto group-hover:scale-105 transition-transform duration-500 aspect-[16\/10] object-contain\"> <\/div>\n<div class=\"w-full flex items-center justify-between gap-4 mb-3\"> <span class=\"text-xs font-bold uppercase tracking-wider text-[#2563eb]\">SKU MY-366<\/span> <span class=\"text-xs text-slate-500 font-medium\">ECE R129 Approved<\/span> <\/div>\n<h3 class=\"w-full text-xl sm:text-2xl font-bold text-slate-900 mb-3 group-hover:text-[#2563eb] transition-colors\"><a href=\"\/booster-car-seats\/high-back-booster-seat\/\" class=\"text-inherit hover:text-[#F5821E] transition-colors\"> High-Back Booster Seat <\/a><\/h3>\n<p class=\"w-full text-sm sm:text-base text-slate-600 mb-6 leading-relaxed\"> Full-coverage side impact defense and ergonomic posture guidance engineered for growing children across long journeys and daily commutes. <\/p>\n<ul class=\"w-full space-y-2.5 mb-6 text-sm text-slate-700\">\n<li class=\"w-full flex items-center gap-2.5\"> <span class=\"w-2 h-2 rounded-full bg-[#2563eb] shrink-0\"><\/span> <span>Child stature coverage: 76&ndash;150 cm<\/span> <\/li>\n<li class=\"w-full flex items-center gap-2.5\"> <span class=\"w-2 h-2 rounded-full bg-[#2563eb] shrink-0\"><\/span> <span>ISOFIX rigid anchors + Top Tether tethering<\/span> <\/li>\n<li class=\"w-full flex items-center gap-2.5\"> <span class=\"w-2 h-2 rounded-full bg-[#2563eb] shrink-0\"><\/span> <span>Net weight: 6.5 KG for manageable logistics<\/span> <\/li>\n<\/ul>\n<\/div>\n<div class=\"w-full pt-4 border-t border-slate-200\/70\"> <a href=\"\/booster-car-seats\/high-back-booster-seat\/\" class=\"apro-btn apro-btn--primary inline-flex justify-center items-center px-8 py-4 text-base font-semibold transition-colors w-full\"> View High-Back Specifications <\/a> <\/div>\n<\/div>\n<div class=\"w-full flex flex-col justify-between rounded-2xl border border-slate-200 bg-slate-50\/50 p-6 md:p-8 transition-all duration-300 hover:shadow-xl hover:border-blue-200 hover:bg-white group apro-card apro-rv apro-rv-u\">\n<div class=\"w-full flex flex-col\">\n<div class=\"w-full overflow-hidden rounded-xl bg-slate-100 mb-6 border border-slate-200\/80 apro-media-wash\"> <img decoding=\"async\" alt=\"Foldable Booster Seat SKU MY-366\" src=\"https:\/\/360carseats.com\/wp-content\/uploads\/2026\/10\/MY-366__MY-366-02-ChatGPT_Image_2026%E5%B9%B46%E6%9C%882%E6%97%A5_12_49_51_3_-transparent.webp\" class=\"w-full h-auto group-hover:scale-105 transition-transform duration-500 aspect-[16\/10] object-contain\"> <\/div>\n<div class=\"w-full flex items-center justify-between gap-4 mb-3\"> <span class=\"text-xs font-bold uppercase tracking-wider text-[#2563eb]\">SKU MY-366<\/span> <span class=\"text-xs text-slate-500 font-medium\">ECE R129 Approved<\/span> <\/div>\n<h3 class=\"w-full text-xl sm:text-2xl font-bold text-slate-900 mb-3 group-hover:text-[#2563eb] transition-colors\"><a href=\"\/booster-car-seats\/foldable-booster-seat\/\" class=\"text-inherit hover:text-[#F5821E] transition-colors\"> Foldable Booster Seat <\/a><\/h3>\n<p class=\"w-full text-sm sm:text-base text-slate-600 mb-6 leading-relaxed\"> Space-efficient folding high-back structure that optimizes container freight efficiency, warehouse footprint, and end-user trunk storage. <\/p>\n<ul class=\"w-full space-y-2.5 mb-6 text-sm text-slate-700\">\n<li class=\"w-full flex items-center gap-2.5\"> <span class=\"w-2 h-2 rounded-full bg-[#2563eb] shrink-0\"><\/span> <span>Child stature coverage: 76&ndash;150 cm<\/span> <\/li>\n<li class=\"w-full flex items-center gap-2.5\"> <span class=\"w-2 h-2 rounded-full bg-[#2563eb] shrink-0\"><\/span> <span>ISOFIX + Top Tether secure connection<\/span> <\/li>\n<li class=\"w-full flex items-center gap-2.5\"> <span class=\"w-2 h-2 rounded-full bg-[#2563eb] shrink-0\"><\/span> <span>Compact fold footprint with 6.5 KG net weight<\/span> <\/li>\n<\/ul>\n<\/div>\n<div class=\"w-full pt-4 border-t border-slate-200\/70\"> <a href=\"\/booster-car-seats\/foldable-booster-seat\/\" class=\"apro-btn apro-btn--primary inline-flex justify-center items-center px-8 py-4 text-base font-semibold transition-colors w-full\"> Explore Foldable Boosters <\/a> <\/div>\n<\/div>\n<div class=\"w-full flex flex-col justify-between rounded-2xl border border-slate-200 bg-slate-50\/50 p-6 md:p-8 transition-all duration-300 hover:shadow-xl hover:border-blue-200 hover:bg-white group md:col-span-2 lg:col-span-1 apro-card apro-rv apro-rv-u\">\n<div class=\"w-full flex flex-col\">\n<div class=\"w-full overflow-hidden rounded-xl bg-slate-100 mb-6 border border-slate-200\/80 apro-media-wash\"> <img decoding=\"async\" alt=\"Harness Booster Seat SKU MY-366\" src=\"https:\/\/360carseats.com\/wp-content\/uploads\/2026\/10\/MY-366__MY-366-03-ChatGPT_Image_2026%E5%B9%B46%E6%9C%8817%E6%97%A5_13_30_18-transparent.webp\" class=\"w-full h-auto group-hover:scale-105 transition-transform duration-500 aspect-[16\/10] object-contain\"> <\/div>\n<div class=\"w-full flex items-center justify-between gap-4 mb-3\"> <span class=\"text-xs font-bold uppercase tracking-wider text-[#2563eb]\">SKU MY-366<\/span> <span class=\"text-xs text-slate-500 font-medium\">ECE R129 Approved<\/span> <\/div>\n<h3 class=\"w-full text-xl sm:text-2xl font-bold text-slate-900 mb-3 group-hover:text-[#2563eb] transition-colors\"><a href=\"\/booster-car-seats\/harness-booster-seat\/\" class=\"text-inherit hover:text-[#F5821E] transition-colors\"> Harness Booster Seat <\/a><\/h3>\n<p class=\"w-full text-sm sm:text-base text-slate-600 mb-6 leading-relaxed\"> Integrated multi-point restraint transitions as toddlers grow, providing stable upper-body retention before moving to standard vehicle belt positioning. <\/p>\n<ul class=\"w-full space-y-2.5 mb-6 text-sm text-slate-700\">\n<li class=\"w-full flex items-center gap-2.5\"> <span class=\"w-2 h-2 rounded-full bg-[#2563eb] shrink-0\"><\/span> <span>Child stature coverage: 76&ndash;150 cm<\/span> <\/li>\n<li class=\"w-full flex items-center gap-2.5\"> <span class=\"w-2 h-2 rounded-full bg-[#2563eb] shrink-0\"><\/span> <span>Rigid ISOFIX anchoring paired with Top Tether<\/span> <\/li>\n<li class=\"w-full flex items-center gap-2.5\"> <span class=\"w-2 h-2 rounded-full bg-[#2563eb] shrink-0\"><\/span> <span>Durable 6.5 KG frame designed for long-term use<\/span> <\/li>\n<\/ul>\n<\/div>\n<div class=\"w-full pt-4 border-t border-slate-200\/70\"> <a href=\"\/booster-car-seats\/harness-booster-seat\/\" class=\"apro-btn apro-btn--primary inline-flex justify-center items-center px-8 py-4 text-base font-semibold transition-colors w-full\"> Discover Harness Options <\/a> <\/div>\n<\/div>\n<\/div>\n<div class=\"w-full mt-12 md:mt-16 rounded-2xl bg-slate-900 text-white p-8 md:p-10 flex flex-col lg:flex-row items-center justify-between gap-6\">\n<div class=\"w-full flex flex-col items-start gap-2\">\n<h4 class=\"w-full text-2xl font-bold tracking-tight text-white\"> Require Custom OEM Tooling or Wholesale Orders? <\/h4>\n<p class=\"w-full text-slate-300 text-sm sm:text-base\"> Our Jiangsu engineering team supports custom trims, branded labeling, packaging design, and scheduled container shipments. <\/p>\n<\/div>\n<div class=\"w-full lg:w-auto flex flex-col sm:flex-row items-stretch sm:items-center gap-4 shrink-0\"> <a href=\"\/contact\/\" class=\"apro-btn apro-btn--primary inline-flex justify-center items-center px-8 py-4 text-base font-semibold transition-colors w-full sm:w-auto\"> Request Product Catalog <\/a> <a href=\"\/oem-car-seats\/\" class=\"apro-btn apro-btn--primary inline-flex justify-center items-center px-8 py-4 text-base font-semibold transition-colors w-full sm:w-auto\"> Contact OEM Specialist <\/a> <\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"w-full bg-gray-50 text-gray-900 mb-0 max-w-full\" style=\"max-width: 100%; width: 100%;\">\n<div class=\"w-full max-w-7xl mx-auto px-6 py-16 md:px-8 md:py-20 lg:py-24\">\n<div class=\"w-full mb-12 md:mb-16\">\n<div class=\"inline-flex items-center gap-2 px-3.5 py-1.5 rounded-full bg-blue-100 text-[#2563eb] text-xs font-semibold uppercase tracking-wider mb-4\"> Professional Child Safety Manufacturing <\/div>\n<h2 class=\"text-3xl sm:text-4xl md:text-4xl w-full font-bold tracking-tight text-gray-900 mb-6\"> Holdum High-Back Booster Seats: Engineered for OEM &amp; Wholesale Excellence <\/h2>\n<p class=\"w-full text-lg md:text-xl text-gray-600 leading-relaxed\"> Our high-back boosters combine ECE R129 safety standards with practical design, offering reliable protection and comfort for children from 76 to 150 cm. <\/p>\n<\/div>\n<div class=\"w-full grid grid-cols-1 lg:grid-cols-12 gap-8 lg:gap-12 items-center mb-16 md:mb-20\">\n<div class=\"w-full lg:col-span-7\">\n<div class=\"relative w-full rounded-2xl overflow-hidden bg-white p-2 md:p-4 shadow-sm border border-gray-200\"> <img decoding=\"async\" alt=\"Holdum high-back booster seat featuring ISOFIX installation and adjustable headrest\" loading=\"lazy\" src=\"https:\/\/360carseats.com\/wp-content\/uploads\/2026\/10\/MY-366__MY-366-01-ChatGPT_Image_2026%E5%B9%B46%E6%9C%882%E6%97%A5_12_49_51_2_-transparent.webp\" class=\"w-full h-auto object-cover rounded-xl\"> <\/div>\n<\/div>\n<div class=\"w-full lg:col-span-5 flex flex-col gap-6\">\n<div class=\"w-full bg-white p-6 md:p-8 rounded-2xl border border-gray-200 shadow-sm apro-card apro-rv apro-rv-u\">\n<div class=\"w-12 h-12 rounded-xl bg-blue-50 text-[#2563eb] flex items-center justify-center font-bold text-xl mb-4\"> 01 <\/div>\n<h3 class=\"w-full text-xl font-bold text-gray-900 mb-2\"> Advanced Side-Impact Safety <\/h3>\n<p class=\"w-full text-gray-600 text-sm md:text-base leading-relaxed\"> Built with energy-absorbing materials engineered to ECE R129 requirements, our shells provide robust protection for the head, neck, and torso during side-impact scenarios. <\/p>\n<\/div>\n<div class=\"w-full bg-white p-6 md:p-8 rounded-2xl border border-gray-200 shadow-sm apro-card apro-rv apro-rv-u\">\n<div class=\"w-12 h-12 rounded-xl bg-blue-50 text-[#2563eb] flex items-center justify-center font-bold text-xl mb-4\"> 02 <\/div>\n<h3 class=\"w-full text-xl font-bold text-gray-900 mb-2\"> Optimized ISOFIX Installation <\/h3>\n<p class=\"w-full text-gray-600 text-sm md:text-base leading-relaxed\"> Engineered for rapid, secure installation. The ISOFIX and Top Tether system ensures the seat remains stable, reducing installation errors for parents and caregivers. <\/p>\n<\/div>\n<div class=\"w-full bg-white p-6 md:p-8 rounded-2xl border border-gray-200 shadow-sm apro-card apro-rv apro-rv-u\">\n<div class=\"w-12 h-12 rounded-xl bg-blue-50 text-[#2563eb] flex items-center justify-center font-bold text-xl mb-4\"> 03 <\/div>\n<h3 class=\"w-full text-xl font-bold text-gray-900 mb-2\"> Adaptable Ergonomic Design <\/h3>\n<p class=\"w-full text-gray-600 text-sm md:text-base leading-relaxed\"> Features an adjustable headrest to support growing children from 76 to 150 cm, ensuring proper seat belt routing and long-term seating comfort. <\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"w-full grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-6\">\n<div class=\"w-full bg-white p-6 rounded-xl border border-gray-200 flex flex-col justify-between apro-card apro-rv apro-rv-u\">\n<div> <span class=\"text-xs font-bold uppercase tracking-wider text-[#2563eb]\">Compliance<\/span> <\/p>\n<h4 class=\"text-lg font-bold text-gray-900 mt-2 mb-2\">ECE R129 Approved<\/h4>\n<p class=\"text-sm text-gray-600\">Fully tested and certified to international safety standards, ensuring market readiness for global distribution.<\/p>\n<\/div>\n<div class=\"mt-6 pt-4 border-t border-gray-100 font-semibold text-xs text-gray-500 uppercase tracking-wider\"> Certified Quality <\/div>\n<\/div>\n<div class=\"w-full bg-white p-6 rounded-xl border border-gray-200 flex flex-col justify-between apro-card apro-rv apro-rv-u\">\n<div> <span class=\"text-xs font-bold uppercase tracking-wider text-[#2563eb]\">Specs<\/span> <\/p>\n<h4 class=\"text-lg font-bold text-gray-900 mt-2 mb-2\">Lightweight Build<\/h4>\n<p class=\"text-sm text-gray-600\">With a net weight of 6.5 kg, our booster seats balance structural integrity with ease of handling for logistical efficiency.<\/p>\n<\/div>\n<div class=\"mt-6 pt-4 border-t border-gray-100 font-semibold text-xs text-gray-500 uppercase tracking-wider\"> Portable Efficiency <\/div>\n<\/div>\n<div class=\"w-full bg-white p-6 rounded-xl border border-gray-200 flex flex-col justify-between apro-card apro-rv apro-rv-u\">\n<div> <span class=\"text-xs font-bold uppercase tracking-wider text-[#2563eb]\">Support<\/span> <\/p>\n<h4 class=\"text-lg font-bold text-gray-900 mt-2 mb-2\">Custom OEM &amp; ODM<\/h4>\n<p class=\"text-sm text-gray-600\">Tailored manufacturing services across booster models and 360 rotating car seats, including bespoke fabric choices, branding, and packaging to meet your specific retail needs.<\/p>\n<\/div>\n<div class=\"mt-6 pt-4 border-t border-gray-100 font-semibold text-xs text-gray-500 uppercase tracking-wider\"> B2B Wholesale <\/div>\n<\/div>\n<div class=\"w-full bg-white p-6 rounded-xl border border-gray-200 flex flex-col justify-between apro-card apro-rv apro-rv-u\">\n<div> <span class=\"text-xs font-bold uppercase tracking-wider text-[#2563eb]\">Utility<\/span> <\/p>\n<h4 class=\"text-lg font-bold text-gray-900 mt-2 mb-2\">High-Stature Range<\/h4>\n<p class=\"text-sm text-gray-600\">Designed to accommodate children up to 150 cm, providing extended product life cycles for your customers.<\/p>\n<\/div>\n<div class=\"mt-6 pt-4 border-t border-gray-100 font-semibold text-xs text-gray-500 uppercase tracking-wider\"> Extended Value <\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"w-full bg-white mb-0 max-w-full\" style=\"max-width: 100%; width: 100%;\">\n<div class=\"w-full max-w-7xl mx-auto px-6 py-16 md:px-8 md:py-20 lg:py-24\">\n<div class=\"grid grid-cols-1 lg:grid-cols-2 gap-12 items-center w-full\">\n<div class=\"w-full flex flex-col gap-6\"> <span class=\"text-[#2563eb] font-bold tracking-wider uppercase text-sm\">Engineered for Travel<\/span> <\/p>\n<h2 class=\"text-3xl sm:text-4xl md:text-4xl font-extrabold text-gray-900 leading-tight\"> The Holdum Foldable Booster Seat <\/h2>\n<p class=\"text-lg text-gray-600 leading-relaxed\"> Experience uncompromising safety with the flexibility modern families require. Designed alongside our innovative collection of 360 rotating car seats, our MY-366 foldable booster combines ECE R129 Approved compliance with a space-saving design, allowing it to collapse quickly for seamless storage in vehicle trunks or carry-on luggage without sacrificing structural integrity. <\/p>\n<div class=\"grid grid-cols-1 md:grid-cols-2 gap-6 mt-4 w-full\">\n<div class=\"flex flex-col gap-2\">\n<h4 class=\"font-bold text-gray-900\">Certified Protection<\/h4>\n<p class=\"text-sm text-gray-500\">ECE R129 approved for stature 76-150 cm with secure ISOFIX and top tether installation.<\/p>\n<\/div>\n<div class=\"flex flex-col gap-2\">\n<h4 class=\"font-bold text-gray-900\">Optimized Portability<\/h4>\n<p class=\"text-sm text-gray-500\">Lightweight 6.5 KG construction designed to fold efficiently for easy transport and storage.<\/p>\n<\/div>\n<\/div>\n<div class=\"w-full pt-4\"> <a href=\"\/booster-car-seats\/foldable-booster-seat\/\" class=\"apro-btn apro-btn--primary inline-flex justify-center items-center px-8 py-4 text-base font-semibold transition-colors\"> View Technical Specifications <\/a> <\/div>\n<\/div>\n<div class=\"w-full h-full flex items-center justify-center\"> <img decoding=\"async\" alt=\"The Holdum foldable booster seat shown in its collapsed, travel-ready configuration\" src=\"https:\/\/360carseats.com\/wp-content\/uploads\/2026\/10\/MY-366__MY-366-02-ChatGPT_Image_2026%E5%B9%B46%E6%9C%882%E6%97%A5_12_49_51_3_-transparent.webp\" class=\"w-full h-auto object-cover rounded-2xl shadow-2xl\"> <\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"w-full bg-gray-50 mb-0 max-w-full\" style=\"max-width: 100%; width: 100%;\">\n<div class=\"w-full max-w-7xl mx-auto px-6 py-16 md:px-8 md:py-20 lg:py-24\">\n<div class=\"grid w-full lg:grid-cols-2 gap-12 lg:gap-20 items-center\">\n<div class=\"w-full space-y-8\">\n<div> <span class=\"text-[#2563eb] font-semibold tracking-wider uppercase text-sm\">ECE R129 Certified Manufacturing<\/span> <\/p>\n<h2 class=\"text-3xl sm:text-4xl md:text-4xl font-bold text-gray-900 mt-3 leading-tight\">Harness Booster Seats for Global Wholesale and OEM Brands<\/h2>\n<\/div>\n<p class=\"text-lg text-gray-600\">Engineered on our proven MY-366 platform, Holdum harness booster seats deliver certified safety from 76 cm to 150 cm. For those seeking advanced versatility beyond standard models, we also offer a comprehensive 360-rotating-car-seat collection. Built for commercial distributors and retail brands, each unit combines secure shoulder-belt routing with a lightweight 6.5 kg structure optimized for volume logistics.<\/p>\n<ul class=\"space-y-4\">\n<li class=\"flex items-start\"> <span class=\"text-[#2563eb] mr-3 text-xl\">&#10003;<\/span> <span class=\"text-gray-700\">Linked headrest and shoulder-belt guides keep the vehicle belt positioned correctly up to 150 cm.<\/span> <\/li>\n<li class=\"flex items-start\"> <span class=\"text-[#2563eb] mr-3 text-xl\">&#10003;<\/span> <span class=\"text-gray-700\">Rigid ISOFIX anchoring paired with Top Tether ensures stable, compliant cabin installation.<\/span> <\/li>\n<li class=\"flex items-start\"> <span class=\"text-[#2563eb] mr-3 text-xl\">&#10003;<\/span> <span class=\"text-gray-700\">Customizable trims, fabrics, and branding options ready for international market compliance.<\/span> <\/li>\n<\/ul>\n<div class=\"pt-4\"> <a href=\"\/contact\/\" class=\"inline-block bg-[#2563eb] text-white px-8 py-4 rounded-lg font-semibold hover:bg-blue-700 transition-colors\">Request OEM Specifications<\/a> <\/div>\n<\/div>\n<div class=\"w-full\"> <img decoding=\"async\" alt=\"Holdum MY-366 ECE R129 Harness Booster Seat with ISOFIX and Top Tether\" src=\"https:\/\/360carseats.com\/wp-content\/uploads\/2026\/10\/MY-366__MY-366-03-ChatGPT_Image_2026%E5%B9%B46%E6%9C%8817%E6%97%A5_13_30_18-transparent.webp\" class=\"w-full h-auto rounded-2xl shadow-xl border border-gray-100\"> <\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"w-full bg-white text-slate-900 antialiased mb-0 max-w-full\" style=\"max-width: 100%; width: 100%;\">\n<div class=\"w-full max-w-7xl mx-auto px-6 py-16 md:px-8 md:py-20 lg:py-24\">\n<div class=\"w-full flex flex-col items-start gap-4 mb-12 md:mb-16\">\n<div class=\"inline-flex items-center gap-2 px-3 py-1 rounded-full bg-[#2563eb]\/10 border border-[#2563eb]\/20 text-[#2563eb] text-xs md:text-sm font-semibold uppercase tracking-wider\"> Crash Protection &amp; Technical Analysis <\/div>\n<h2 class=\"text-3xl sm:text-4xl md:text-4xl w-full font-extrabold tracking-tight text-slate-950\"> High-Back vs. Backless Boosters: Safety Architecture Comparison <\/h2>\n<p class=\"w-full text-base md:text-lg text-slate-600 leading-relaxed\"> Why global <a href=\"\/blog\/\" class=\"hover:underline font-semibold text-[#F5821E]\">safety regulations and major retail channels prioritize high-back booster engineering<\/a> for side-impact attenuation and consistent seat belt positioning. <\/p>\n<\/div>\n<div class=\"w-full grid grid-cols-1 lg:grid-cols-2 gap-8 mb-16\">\n<div class=\"w-full flex flex-col justify-between rounded-2xl border-2 border-[#2563eb] bg-slate-50 p-6 md:p-8 shadow-sm\">\n<div class=\"w-full\">\n<div class=\"w-full flex items-center justify-between gap-4 mb-6\"> <span class=\"px-3 py-1 rounded bg-[#2563eb] text-white text-xs font-bold tracking-wide uppercase\"> Full Lateral Protection <\/span> <span class=\"text-xs font-semibold text-slate-500\">ECE R129 Approved<\/span> <\/div>\n<h3 class=\"w-full text-2xl font-bold text-slate-900 mb-3\"> Holdum High-Back Architecture <\/h3>\n<p class=\"w-full text-sm md:text-base text-slate-600 mb-6 leading-relaxed\"> Constructed with structural side wings and energy-absorbing headrests that actively shield the head, neck, and torso while maintaining exact belt alignment as children grow. <\/p>\n<div class=\"w-full mb-6 overflow-hidden rounded-xl border border-slate-200 bg-white\"> <img decoding=\"async\" alt=\"High-back booster side-impact protection and structural wing diagram\" loading=\"lazy\" src=\"https:\/\/360carseats.com\/wp-content\/uploads\/2026\/10\/MY-366__MY-366-04-ChatGPT_Image_2026%E5%B9%B46%E6%9C%882%E6%97%A5_12_49_50_1_-transparent.webp\" class=\"w-full h-auto object-cover\"> <\/div>\n<ul class=\"w-full space-y-3 mb-6\">\n<li class=\"w-full flex items-start gap-3 text-sm text-slate-700\"> <svg fill=\"none\" stroke=\"currentColor\" viewbox=\"0 0 24 24\" class=\"w-5 h-5 text-[#2563eb] shrink-0 mt-0.5\"><path d=\"M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\"><\/path><\/svg> <span><strong>Integrated Side-Impact Wings:<\/strong> Absorbs lateral impact forces and helps restrict severe sideways head movement.<\/span> <\/li>\n<li class=\"w-full flex items-start gap-3 text-sm text-slate-700\"> <svg fill=\"none\" stroke=\"currentColor\" viewbox=\"0 0 24 24\" class=\"w-5 h-5 text-[#2563eb] shrink-0 mt-0.5\"><path d=\"M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\"><\/path><\/svg> <span><strong>Shoulder Belt Positioning:<\/strong> Fixed upper guides keep the vehicle diagonal belt resting securely across the collarbone.<\/span> <\/li>\n<li class=\"w-full flex items-start gap-3 text-sm text-slate-700\"> <svg fill=\"none\" stroke=\"currentColor\" viewbox=\"0 0 24 24\" class=\"w-5 h-5 text-[#2563eb] shrink-0 mt-0.5\"><path d=\"M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\"><\/path><\/svg> <span><strong>Adjustable Headrest Geometry:<\/strong> Supports sleeping children to prevent dangerous forward or sideways slouching.<\/span> <\/li>\n<\/ul>\n<\/div>\n<div class=\"w-full pt-4 border-t border-slate-200\">\n<div class=\"w-full flex items-center justify-between text-xs font-semibold text-slate-600\"> <span>Side-Impact Protection Level<\/span> <span class=\"text-[#2563eb] font-bold\">Comprehensive Shell &amp; Wing Enclosure<\/span> <\/div>\n<\/div>\n<\/div>\n<div class=\"w-full flex flex-col justify-between rounded-2xl border border-slate-200 bg-white p-6 md:p-8 shadow-sm apro-card apro-rv apro-rv-u\">\n<div class=\"w-full\">\n<div class=\"w-full flex items-center justify-between gap-4 mb-6\"> <span class=\"px-3 py-1 rounded bg-slate-200 text-slate-700 text-xs font-bold tracking-wide uppercase\"> Belt Lift Cushion Only <\/span> <span class=\"text-xs font-semibold text-slate-500\">Minimalist Travel Configuration<\/span> <\/div>\n<h3 class=\"w-full text-2xl font-bold text-slate-900 mb-3\"> Conventional Backless Design <\/h3>\n<p class=\"w-full text-sm md:text-base text-slate-600 mb-6 leading-relaxed\"> Elevates the child solely to fit vehicle lap belts, leaving upper body containment and lateral crash mitigation entirely dependent on the vehicle door and vehicle side airbags. <\/p>\n<div class=\"w-full mb-6 overflow-hidden rounded-xl border border-slate-200 bg-slate-50\"> <img loading=\"lazy\" loading=\"lazy\" alt=\"Hands adjusting the harness height on a dark grey harness booster seat, headrest sliding along its track\" loading=\"lazy\" src=\"https:\/\/360carseats.com\/wp-content\/uploads\/2026\/11\/holdum-n12-1.webp\" class=\"w-full h-auto object-cover\" width=\"1536\" height=\"864\" srcset=\"https:\/\/360carseats.com\/wp-content\/uploads\/2026\/11\/holdum-n12-1-300x169.webp 300w, https:\/\/360carseats.com\/wp-content\/uploads\/2026\/11\/holdum-n12-1-768x432.webp 768w, https:\/\/360carseats.com\/wp-content\/uploads\/2026\/11\/holdum-n12-1-1024x576.webp 1024w, https:\/\/360carseats.com\/wp-content\/uploads\/2026\/11\/holdum-n12-1.webp 1280w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" decoding=\"async\"> <\/div>\n<ul class=\"w-full space-y-3 mb-6\">\n<li class=\"w-full flex items-start gap-3 text-sm text-slate-700\"> <svg fill=\"none\" stroke=\"currentColor\" viewbox=\"0 0 24 24\" class=\"w-5 h-5 text-amber-500 shrink-0 mt-0.5\"><path d=\"M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\"><\/path><\/svg> <span><strong>Zero Head Enclosure:<\/strong> No built-in protective buffer between the occupant&#8217;s head and intruding vehicle doors.<\/span> <\/li>\n<li class=\"w-full flex items-start gap-3 text-sm text-slate-700\"> <svg fill=\"none\" stroke=\"currentColor\" viewbox=\"0 0 24 24\" class=\"w-5 h-5 text-amber-500 shrink-0 mt-0.5\"><path d=\"M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\"><\/path><\/svg> <span><strong>Postural Vulnerability:<\/strong> Slumping or sleeping easily displaces the shoulder belt across the child&#8217;s neck or arm.<\/span> <\/li>\n<li class=\"w-full flex items-start gap-3 text-sm text-slate-700\"> <svg fill=\"none\" stroke=\"currentColor\" viewbox=\"0 0 24 24\" class=\"w-5 h-5 text-amber-500 shrink-0 mt-0.5\"><path d=\"M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\"><\/path><\/svg> <span><strong>Strict Regulatory Thresholds:<\/strong> Modern safety standards and major retail channels increasingly favor high-back designs for younger travelers.<\/span> <\/li>\n<\/ul>\n<\/div>\n<div class=\"w-full pt-4 border-t border-slate-200\">\n<div class=\"w-full flex items-center justify-between text-xs font-semibold text-slate-600\"> <span>Side-Impact Protection Level<\/span> <span class=\"text-amber-600 font-bold\">Unshielded Upper Body<\/span> <\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"w-full overflow-hidden rounded-2xl border border-slate-200 bg-white shadow-sm mb-16\">\n<div class=\"w-full p-6 md:p-8 bg-slate-50 border-b border-slate-200\">\n<h3 class=\"w-full text-xl md:text-2xl font-bold text-slate-900 mb-2\"> Engineering Specifications &amp; Structural Comparison <\/h3>\n<p class=\"w-full text-sm md:text-base text-slate-600\"> A side-by-side technical review of protective capabilities across critical vehicle crash scenarios. <\/p>\n<\/div>\n<div class=\"w-full overflow-x-auto\">\n<table class=\"w-full text-left border-collapse\">\n<thead>\n<tr class=\"border-b border-slate-200 bg-slate-100\/75 text-xs font-bold uppercase tracking-wider text-slate-700\">\n<th scope=\"col\" class=\"py-4 px-6\">Safety Vector \/ Metric<\/th>\n<th scope=\"col\" class=\"py-4 px-6 text-[#2563eb]\">Holdum High-Back Platform<\/th>\n<th scope=\"col\" class=\"py-4 px-6 text-slate-600\">Standard Backless Booster<\/th>\n<th scope=\"col\" class=\"py-4 px-6\">Regulatory Benchmark<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"divide-y divide-slate-200 text-sm\">\n<tr class=\"hover:bg-slate-50\/80 transition-colors\">\n<th scope=\"row\" class=\"py-4 px-6 font-semibold text-slate-900\"> Head Lateral Displacement <\/th>\n<td class=\"py-4 px-6 font-medium text-emerald-700\"> Constrained within deep side wings <\/td>\n<td class=\"py-4 px-6 text-slate-600\"> Unrestricted lateral head excursion <\/td>\n<td class=\"py-4 px-6 text-slate-500\"> ECE R129 Side-Impact <\/td>\n<\/tr>\n<tr class=\"hover:bg-slate-50\/80 transition-colors\">\n<th scope=\"row\" class=\"py-4 px-6 font-semibold text-slate-900\"> Cervical Spine Protection <\/th>\n<td class=\"py-4 px-6 font-medium text-emerald-700\"> Continuous lateral head &amp; torso support <\/td>\n<td class=\"py-4 px-6 text-amber-700\"> No built-in cervical support <\/td>\n<td class=\"py-4 px-6 text-slate-500\"> Dynamic Sled Testing <\/td>\n<\/tr>\n<tr class=\"hover:bg-slate-50\/80 transition-colors\">\n<th scope=\"row\" class=\"py-4 px-6 font-semibold text-slate-900\"> Side-Impact Energy Dispersion <\/th>\n<td class=\"py-4 px-6 font-medium text-emerald-700\"> Engineered shell &amp; foam absorption <\/td>\n<td class=\"py-4 px-6 text-slate-600\"> Relies entirely on vehicle interior <\/td>\n<td class=\"py-4 px-6 text-slate-500\"> UN R129 Standards <\/td>\n<\/tr>\n<tr class=\"hover:bg-slate-50\/80 transition-colors\">\n<th scope=\"row\" class=\"py-4 px-6 font-semibold text-slate-900\"> Torso Rollout Tendency <\/th>\n<td class=\"py-4 px-6 font-medium text-emerald-700\"> Secured by dedicated shoulder belt routing <\/td>\n<td class=\"py-4 px-6 text-amber-700\"> Prone to slippage if child shifts or sleeps <\/td>\n<td class=\"py-4 px-6 text-slate-500\"> Belt Fit Guidelines <\/td>\n<\/tr>\n<tr class=\"hover:bg-slate-50\/80 transition-colors\">\n<th scope=\"row\" class=\"py-4 px-6 font-semibold text-slate-900\"> Submarining Prevention <\/th>\n<td class=\"py-4 px-6 font-medium text-emerald-700\"> Anatomical base contouring &amp; armrest guides <\/td>\n<td class=\"py-4 px-6 text-slate-600\"> Dependent on basic belt guide horns <\/td>\n<td class=\"py-4 px-6 text-slate-500\"> Pelvic Restraint Standards <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<div class=\"w-full rounded-2xl bg-slate-900 text-white p-8 md:p-12 flex flex-col md:flex-row items-center justify-between gap-8\">\n<div class=\"w-full md:w-3\/4 flex flex-col gap-3\"> <span class=\"text-xs font-bold uppercase tracking-widest text-[#F5821E]\"> Manufacturing Recommendation <\/span> <\/p>\n<h3 class=\"w-full text-2xl md:text-3xl font-bold tracking-tight text-white\"> Full Upper-Body Protection Up to 150 cm Stature <\/h3>\n<p class=\"w-full text-sm md:text-base text-slate-300 leading-relaxed\"> While backless boosters offer basic pelvic belt positioning, market demands under ECE R129 favor <a href=\"\/booster-car-seats\/high-back-booster-seat\/\" class=\"hover:underline font-semibold text-[#F5821E]\">high-back booster seat solutions<\/a> that provide reliable side-impact protection and posture control until a child safely fits the vehicle&#8217;s standard three-point belt. <\/p>\n<\/div>\n<div class=\"w-full md:w-1\/4 flex md:justify-end\">\n<div class=\"w-full md:w-auto text-center md:text-right border-l-2 md:border-l-0 md:border-r-2 border-[#2563eb] pl-4 md:pl-0 md:pr-4\">\n<div class=\"text-3xl lg:text-4xl font-black text-white\">150 cm<\/div>\n<div class=\"text-xs uppercase font-medium tracking-wide text-[#CBD5E1]\">Complete Coverage Stature<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"w-full bg-gray-50 mb-0 max-w-full\" style=\"max-width: 100%; width: 100%;\">\n<div class=\"w-full max-w-7xl mx-auto px-6 py-16 md:px-8 md:py-20 lg:py-24\">\n<div class=\"grid grid-cols-1 lg:grid-cols-2 gap-16 items-center w-full\">\n<div class=\"w-full flex flex-col gap-6\"> <span class=\"text-[#2563eb] font-bold tracking-wider uppercase text-sm\">Engineering Highlight<\/span> <\/p>\n<h2 class=\"text-3xl sm:text-4xl md:text-4xl font-extrabold text-gray-900 leading-tight\">MY-366 Model: Precision Foldable Booster Engineering<\/h2>\n<p class=\"text-lg text-gray-600\">Manufactured by Holdum for global distributors and OEM brands, the MY-366 high-back booster leverages the robust structural design principles of our convertible all-in-one car seats, combining compliant crash-test performance with a compact folding structure designed to optimize retail packaging and container freight efficiency.<\/p>\n<div class=\"grid grid-cols-1 md:grid-cols-2 gap-6 w-full pt-4\">\n<div class=\"bg-white p-6 rounded-xl border border-gray-100 shadow-sm apro-card apro-rv apro-rv-u\">\n<h4 class=\"font-bold text-gray-900 mb-2\">Stature Range<\/h4>\n<p class=\"text-gray-600 text-sm\">Engineered for children from 76 cm to 150 cm, delivering the adaptable longevity of an <a href=\"\/convertible-all-in-one-car-seats\/all-in-one-car-seat\/\" class=\"hover:underline font-semibold text-[#F5821E]\">all-in-one car seat<\/a> while providing structured ergonomic support across every growth phase.<\/p>\n<\/div>\n<div class=\"bg-white p-6 rounded-xl border border-gray-100 shadow-sm apro-card apro-rv apro-rv-u\">\n<h4 class=\"font-bold text-gray-900 mb-2\">ECE R129 Certified<\/h4>\n<p class=\"text-gray-600 text-sm\">Rigidly tested and certified to ECE R129 Approved standards, offering verified dynamic side-impact and torso shielding.<\/p>\n<\/div>\n<div class=\"bg-white p-6 rounded-xl border border-gray-100 shadow-sm apro-card apro-rv apro-rv-u\">\n<h4 class=\"font-bold text-gray-900 mb-2\">Installation Methods<\/h4>\n<p class=\"text-gray-600 text-sm\">Equipped with steel ISOFIX arms and an adjustable Top Tether anchor for locked-in chassis stability.<\/p>\n<\/div>\n<div class=\"bg-white p-6 rounded-xl border border-gray-100 shadow-sm apro-card apro-rv apro-rv-u\">\n<h4 class=\"font-bold text-gray-900 mb-2\">Foldable Design<\/h4>\n<p class=\"text-gray-600 text-sm\">Quick-fold backrest mechanism reduces overall cube size for streamlined palletization and customer transport.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"w-full\">\n<div class=\"w-full overflow-hidden rounded-2xl shadow-xl\"> <img decoding=\"async\" alt=\"Engineering overview and dimensions of the MY-366 foldable booster car seat\" src=\"https:\/\/360carseats.com\/wp-content\/uploads\/2026\/10\/MY-366__MY-366-04-ChatGPT_Image_2026%E5%B9%B46%E6%9C%882%E6%97%A5_12_49_50_1_-transparent.webp\" class=\"w-full h-auto object-cover\"> <\/div>\n<div class=\"mt-8 p-6 bg-[#2563eb] rounded-xl text-white\">\n<h3 class=\"text-xl font-bold mb-2\">Technical Specifications<\/h3>\n<ul class=\"space-y-2 text-blue-50 text-sm\">\n<li class=\"flex justify-between border-b border-blue-400 py-2\"><span>Model Identification<\/span> <span>MY-366<\/span><\/li>\n<li class=\"flex justify-between border-b border-blue-400 py-2\"><span>Certification Standard<\/span> <span>ECE R129 Approved<\/span><\/li>\n<li class=\"flex justify-between border-b border-blue-400 py-2\"><span>Applicable Stature<\/span> <span>76&ndash;150 cm<\/span><\/li>\n<li class=\"flex justify-between py-2\"><span>Mounting System<\/span> <span>ISOFIX + Top Tether (Net Weight 6.5 kg)<\/span><\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"bg-white w-full mb-0 max-w-full\" style=\"max-width: 100%; width: 100%;\">\n<div class=\"w-full max-w-7xl mx-auto px-6 py-16 md:px-8 md:py-20 lg:py-24\">\n<div class=\"flex flex-col lg:flex-row items-center gap-12 w-full\">\n<div class=\"w-full lg:w-1\/2 flex flex-col gap-6\">\n<h2 class=\"text-3xl sm:text-4xl md:text-4xl font-extrabold text-[#111827] leading-tight\"> Why Global Brands Partner with Holdum for Booster Seats <\/h2>\n<p class=\"text-lg md:text-xl text-[#4b5563]\"> From direct factory engineering in Jiangsu to reliable port delivery, we provide child car seat importers and private labels with compliant manufacturing and dedicated supply chain <a href=\"\/contact\/\" class=\"hover:underline font-semibold text-[#F5821E]\">support<\/a>. <\/p>\n<div class=\"grid grid-cols-1 md:grid-cols-2 gap-6 pt-4\">\n<div class=\"w-full\">\n<h3 class=\"text-xl font-bold text-[#2563eb] mb-2\">ECE R129 Compliance<\/h3>\n<p class=\"text-[#374151]\">Strict in-line assembly audits and rigorous impact testing ensure every booster model adheres to international safety standards.<\/p>\n<\/div>\n<div class=\"w-full\">\n<h3 class=\"text-xl font-bold text-[#2563eb] mb-2\">Full OEM &amp; ODM Flexibility<\/h3>\n<p class=\"text-[#374151]\">Customize fabric covers, branding, harness systems, and retail packaging through specialized <a href=\"\/oem-car-seats\/\" class=\"hover:underline font-semibold text-[#F5821E]\">OEM car seats<\/a> solutions that align seamlessly with your regional market demands.<\/p>\n<\/div>\n<div class=\"w-full\">\n<h3 class=\"text-xl font-bold text-[#2563eb] mb-2\">Optimized Export Logistics<\/h3>\n<p class=\"text-[#374151]\">Compact, foldable booster designs reduce carton cube dimensions, maximizing container loading capacity and cutting freight costs.<\/p>\n<\/div>\n<div class=\"w-full\">\n<h3 class=\"text-xl font-bold text-[#2563eb] mb-2\">Dependable B2B Supply<\/h3>\n<p class=\"text-[#374151]\">Consistent production scheduling and responsive account management provide wholesale distributors with predictable, on-time delivery.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"w-full lg:w-1\/2\"> <img loading=\"lazy\" loading=\"lazy\" alt=\"Holdum booster car seat manufacturing facility and quality testing\" src=\"https:\/\/360carseats.com\/wp-content\/uploads\/2026\/10\/home-turnkey-factory.webp\" class=\"w-full h-auto object-cover rounded-2xl shadow-2xl border border-[#e5e7eb]\" width=\"1152\" height=\"864\" srcset=\"https:\/\/360carseats.com\/wp-content\/uploads\/2026\/10\/home-turnkey-factory.webp 1152w, https:\/\/360carseats.com\/wp-content\/uploads\/2026\/10\/home-turnkey-factory-300x225.webp 300w, https:\/\/360carseats.com\/wp-content\/uploads\/2026\/10\/home-turnkey-factory-1024x768.webp 1024w, https:\/\/360carseats.com\/wp-content\/uploads\/2026\/10\/home-turnkey-factory-768x576.webp 768w\" sizes=\"auto, (max-width: 1152px) 100vw, 1152px\" decoding=\"async\"> <\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n<p><script>\n(function () {\n  document.documentElement.classList.add(\"apro-js\");\n  if (!(\"IntersectionObserver\" in window)) {\n    document.querySelectorAll(\".apro-rv\").forEach(function (el) {\n      el.classList.add(\"is-in\");\n    });\n    return;\n  }\n  var io = new IntersectionObserver(function (entries) {\n    entries.forEach(function (entry) {\n      if (entry.isIntersecting) {\n        entry.target.classList.add(\"is-in\");\n        io.unobserve(entry.target);\n      }\n    });\n  }, { threshold: 0.15, rootMargin: \"0px 0px -6% 0px\" });\n  document.querySelectorAll(\".apro-rv\").forEach(function (el) {\n    var delay = el.getAttribute(\"data-rv-delay\");\n    if (delay) {\n      el.style.transitionDelay = (parseInt(delay, 10) \/ 1000) + \"s\";\n    }\n    io.observe(el);\n  });\n})();\n<\/script><script>document.documentElement.classList.add(\"apro-js\");<\/script><br \/>\n<!-- AIVB Layout Support --><\/p>\n<style data-aivb-layout-support=\"1\">\n#content { width: 100% !important;  max-width: 100% !important; }\n#content > div:first-child { width: 100% !important;  max-width: 100% !important; }\n.ast-container { width: 100% !important;  max-width: 100% !important; }\nmain#content { width: 100% !important; max-width: 100% !important; }\n.page-content { width: 100% !important; max-width: 100% !important; }\n.site-content .ast-container { display: block !important; }\n<\/style>\n<p><!-- End AIVB Layout Support --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>OEM &amp; ODM Booster Solutions Booster Car Seats Manufacturer &amp; Supplier Holdum manufactures booster car seats \u2014 including high-back, harness, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","ast-site-content-layout":"default","site-content-style":"unboxed","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-91006","page","type-page","status-publish","hentry"],"_hostinger_reach_plugin_has_subscription_block":false,"_hostinger_reach_plugin_is_elementor":false,"_links":{"self":[{"href":"https:\/\/360carseats.com\/ja\/wp-json\/wp\/v2\/pages\/91006","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/360carseats.com\/ja\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/360carseats.com\/ja\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/360carseats.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/360carseats.com\/ja\/wp-json\/wp\/v2\/comments?post=91006"}],"version-history":[{"count":16,"href":"https:\/\/360carseats.com\/ja\/wp-json\/wp\/v2\/pages\/91006\/revisions"}],"predecessor-version":[{"id":91857,"href":"https:\/\/360carseats.com\/ja\/wp-json\/wp\/v2\/pages\/91006\/revisions\/91857"}],"wp:attachment":[{"href":"https:\/\/360carseats.com\/ja\/wp-json\/wp\/v2\/media?parent=91006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}