{"product_id":"castiron-grip-one-youth-velcro-climbing-shoe","title":"Castiron Grip ONE — Youth Velcro Climbing Shoe","description":"\u003ch2\u003eCastiron Grip ONE — Youth Velcro Climbing Shoe\u003c\/h2\u003e\u003cp\u003eThe wall doesn't care how old you are. The ONE doesn't either. Young climbers who are serious about the sport need a \u003ca href=\"\/en-nordic\/collections\/castiron-grip\"\u003eclimbing shoe\u003c\/a\u003e that takes them seriously — a secure velcro closure, flexible sole, and high-friction rubber that reads the hold before they do. Not a starter shoe. Not a toy. A proper climbing shoe built to the Castiron standard, sized for the next generation. Yellow, Black, or Orange. One standard. Every send.\u003c\/p\u003e\u003cp\u003eThe ONE's velcro closure gives young climbers the best of both worlds — the precision of a performance shoe with the convenience of fast on\/off between problems. The slightly tapered toe box introduces performance fit without the discomfort of an aggressive downturn. The high-friction rubber holds on gym holds, slab, and vertical alike. It's the bridge between the Little ALIEN and the adult PR23 — the shoe that builds the footwork habits that last a career. \u003cem\u003eFormerly Rock Planet ONE — same production, same performance. Castiron standard.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyle:\u003c\/strong\u003e Youth velcro climbing shoe\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClosure:\u003c\/strong\u003e Velcro — fast, secure, adjustable between problems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSole:\u003c\/strong\u003e High-friction rubber — precision grip on gym holds, slab, and vertical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eToe Box:\u003c\/strong\u003e Slightly tapered — more precision than beginner, no aggressive downturn\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpper:\u003c\/strong\u003e Synthetic microfiber — durable, breathable, easy to clean\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeel:\u003c\/strong\u003e Structured heel cup — secure lockdown for dynamic movement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAge Group:\u003c\/strong\u003e Kids \/ Youth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColors:\u003c\/strong\u003e Yellow · Black · Orange\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSizes:\u003c\/strong\u003e EU 28–35 | US Kids 10C–4Y | UK 9.5–3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Youth climbers progressing beyond beginner level, indoor bouldering, sport climbing, climbing clubs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSize Guide\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eEU\u003c\/th\u003e\n\u003cth\u003eUS Kids\u003c\/th\u003e\n\u003cth\u003eUK\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eEU 28\u003c\/td\u003e\n\u003ctd\u003eUS 10C\u003c\/td\u003e\n\u003ctd\u003eUK 9.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEU 29\u003c\/td\u003e\n\u003ctd\u003eUS 11.5C\u003c\/td\u003e\n\u003ctd\u003eUK 11.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEU 30\u003c\/td\u003e\n\u003ctd\u003eUS 12C\u003c\/td\u003e\n\u003ctd\u003eUK 12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEU 31\u003c\/td\u003e\n\u003ctd\u003eUS 13C\u003c\/td\u003e\n\u003ctd\u003eUK 13\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEU 32\u003c\/td\u003e\n\u003ctd\u003eUS 1Y\u003c\/td\u003e\n\u003ctd\u003eUK 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEU 33\u003c\/td\u003e\n\u003ctd\u003eUS 2Y\u003c\/td\u003e\n\u003ctd\u003eUK 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEU 34\u003c\/td\u003e\n\u003ctd\u003eUS 3Y\u003c\/td\u003e\n\u003ctd\u003eUK 3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEU 35\u003c\/td\u003e\n\u003ctd\u003eUS 4Y\u003c\/td\u003e\n\u003ctd\u003eUK 3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cem\u003eRuns true to EU size. Order your child's normal EU shoe size. For a snugger performance fit, size down 0.5 EU.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eWhy the ONE?\u003c\/h3\u003e\u003cp\u003eThe ONE is the shoe that turns casual climbers into serious ones. The velcro closure means no stopping mid-session to retie laces. The slightly tapered toe box gives young climbers their first taste of performance fit — precise enough to improve footwork, comfortable enough to wear all session. The structured heel cup holds through dynamic moves that beginner shoes can't handle. When they outgrow the Little ALIEN and are ready for more — this is the next step. One standard. Every send.\u003c\/p\u003e\u003ch3\u003eBest For\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eYouth climbers progressing beyond their first shoe\u003c\/li\u003e\n\u003cli\u003eIndoor bouldering and sport climbing\u003c\/li\u003e\n\u003cli\u003eClimbing clubs and youth competition prep\u003c\/li\u003e\n\u003cli\u003eKids aged 6–12 developing serious technique\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAlso in the Castiron Grip Line\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-nordic\/products\/castiron-grip-pr23-climbing-shoe\"\u003ePR23\u003c\/a\u003e — flagship performance velcro, EU 35–44\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-nordic\/products\/castiron-grip-n23-climbing-shoe\"\u003eN23\u003c\/a\u003e — precision edge, dual velcro, EU 35–44\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-nordic\/products\/castiron-grip-swift-climbing-shoe\"\u003eSWIFT\u003c\/a\u003e — all-round lace-up, EU 35–44\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-nordic\/products\/castiron-grip-alien-beginner-slip-on-climbing-shoe\"\u003eLittle ALIEN\u003c\/a\u003e — kids slip-on beginner, EU 29–35\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/en-nordic\/products\/castiron-grip-hug-kids-beginner-climbing-shoe\"\u003eHUG\u003c\/a\u003e — kids beginner, EU 25–32\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Castiron Grip","offers":[{"title":"Black \/ EU 28 \/ US 10C","offer_id":48974775222522,"sku":"ONE-BLACK-EU28","price":65.0,"currency_code":"EUR","in_stock":true},{"title":"Black \/ EU 29 \/ US 11.5C","offer_id":48974775255290,"sku":"ONE-BLACK-EU29","price":65.0,"currency_code":"EUR","in_stock":true},{"title":"Black \/ EU 30 \/ US 12C","offer_id":48974775288058,"sku":"ONE-BLACK-EU30","price":65.0,"currency_code":"EUR","in_stock":true},{"title":"Black \/ EU 31 \/ US 13C","offer_id":48974775320826,"sku":"ONE-BLACK-EU31","price":65.0,"currency_code":"EUR","in_stock":true},{"title":"Black \/ EU 32 \/ US 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