{"product_id":"castiron-grip-n23-climbing-shoe","title":"Castiron Grip N23 — Precision Edge Climbing Shoe","description":"\u003cp\u003e\u003cstrong\u003eAggressive downturn. Dual strap. High-friction rubber. The N23 was built for climbers who need their shoe to do exactly what they tell it — nothing more, nothing less.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003ePrecision edging on vertical faces. Secure lockdown on overhangs. The N23 doesn't negotiate with the wall — it reads it.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eFormerly Rock Planet N23 — same production, same performance. Castiron standard.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eBuilt For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eIndoor bouldering\u003c\/li\u003e\n\u003cli\u003eOverhang climbing\u003c\/li\u003e\n\u003cli\u003ePrecision edging on vertical routes\u003c\/li\u003e\n\u003cli\u003eIntermediate to advanced climbers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClosure:\u003c\/strong\u003e Dual velcro strap\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSole:\u003c\/strong\u003e High-friction rubber — precision edging and heel hooking\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eToe box:\u003c\/strong\u003e Aggressive downturn for performance on overhangs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpper:\u003c\/strong\u003e Synthetic microfiber — Pink \/ Grey \/ Yellow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSizes:\u003c\/strong\u003e EU35–44\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColours:\u003c\/strong\u003e Pink, Red\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSizing\u003c\/h2\u003e\u003cp\u003eRuns small due to aggressive downturn. Consider going up 0.5–1 EU from your normal size. Women size up 1.5 from men's US sizing. See our size guide for full conversion.\u003c\/p\u003e\u003ch2\u003eFormerly Rock Planet\u003c\/h2\u003e\u003cp\u003eThe N23 was previously sold as Rock Planet N23 — trusted by climbers across Europe, the UK, Australia, and North America. In 2026, the line became Castiron Grip. Same shoe. Castiron identity.\u003c\/p\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this the same as the Rock Planet N23?\u003c\/strong\u003e\u003cbr\u003eYes. Same production, same performance standards. Rebranded under Castiron Grip in 2026.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow aggressive is the downturn?\u003c\/strong\u003e\u003cbr\u003eModerate-aggressive. More than a beginner shoe, less than a pure competition shoe. Ideal for V3–V7 bouldering and 5.10–5.12 sport climbing.\u003c\/p\u003e","brand":"Castiron Grip","offers":[{"title":"Pink \/ US 5.5 Women\/US 4 Men","offer_id":48968897233146,"sku":"N23","price":141.0,"currency_code":"AUD","in_stock":true},{"title":"Pink \/ US 6.5 Women\/US 5 Men","offer_id":48968897265914,"sku":"N24","price":141.0,"currency_code":"AUD","in_stock":true},{"title":"Pink \/ US 7.5 Women\/US 6 Men","offer_id":48968897298682,"sku":"N25","price":141.0,"currency_code":"AUD","in_stock":true},{"title":"Pink \/ US 8.5 Women\/US 7 Men","offer_id":48968897331450,"sku":"N26","price":141.0,"currency_code":"AUD","in_stock":true},{"title":"Pink \/ US 9.5 Women\/US 8 Men","offer_id":48968897364218,"sku":"N27","price":141.0,"currency_code":"AUD","in_stock":true},{"title":"Pink \/ US 10.5 Women\/US 9 Men","offer_id":48968897396986,"sku":"N28","price":141.0,"currency_code":"AUD","in_stock":true},{"title":"Pink \/ US 11 Women\/US 10 Men","offer_id":48968897429754,"sku":"N29","price":141.0,"currency_code":"AUD","in_stock":true},{"title":"Pink \/ US 11.5 Women\/US 11 Men","offer_id":48968897462522,"sku":"N30","price":141.0,"currency_code":"AUD","in_stock":true},{"title":"Pink \/ US 12.5 Women\/US 12 Men","offer_id":48968897495290,"sku":"N31","price":141.0,"currency_code":"AUD","in_stock":true},{"title":"Red \/ US 5.5 Women\/US 4 Men","offer_id":48968897528058,"sku":"N32","price":141.0,"currency_code":"AUD","in_stock":true},{"title":"Red \/ US 6.5 Women\/US 5 Men","offer_id":48968897560826,"sku":"N33","price":141.0,"currency_code":"AUD","in_stock":true},{"title":"Red \/ US 7.5 Women\/US 6 Men","offer_id":48968897593594,"sku":"N34","price":141.0,"currency_code":"AUD","in_stock":true},{"title":"Red \/ US 8.5 Women\/US 7 Men","offer_id":48968897626362,"sku":"N35","price":141.0,"currency_code":"AUD","in_stock":true},{"title":"Red \/ US 9.5 Women\/US 8 Men","offer_id":48968897659130,"sku":"N36","price":141.0,"currency_code":"AUD","in_stock":true},{"title":"Red \/ US 10.5 Women\/US 9 Men","offer_id":48968897691898,"sku":"N37","price":141.0,"currency_code":"AUD","in_stock":true},{"title":"Red \/ US 11 Women\/US 10 Men","offer_id":48968897724666,"sku":"N38","price":141.0,"currency_code":"AUD","in_stock":true},{"title":"Red \/ US 11.5 Women\/US 11 Men","offer_id":48968897757434,"sku":"N39","price":141.0,"currency_code":"AUD","in_stock":true},{"title":"Red \/ US 12.5 Women\/US 12 Men","offer_id":48968897790202,"sku":"N40","price":141.0,"currency_code":"AUD","in_stock":true}],"url":"https:\/\/www.castiron-lift.com\/en-au\/products\/castiron-grip-n23-climbing-shoe","provider":"Castiron Lift","version":"1.0","type":"link"}