Back based on the demand of our most technically proficient climbers, the Boostic is our stiffest high-performance shoe, delivering unmatched edging power and precision for the tiniest features. With a V-Tension Rand, and a full-length VibramA(R) XS Edge outsole, the Boostic provides ultimate support and micro-edging precision for your most technical projects. DUAL VELCRO STRAP Dual Velcro strap closure is super secure and wraps the foot in support and performance, dialing up the precision and edging power. RUBBER TOE PATCH A recessed rubber toe patch tucks under the rand rubber, providing durable protection and hooking ability. Technical Specs Size Options : 35 - 45 (half sizes) Weight Reference : 245g; 8.6oz (1/2 pair size 41)? Waterproof/Breathable : PFAS Compliant UPPER : Microsuede + Eco Leather MIDSOLE : Flexan 1.0 Outsole : VibramA(R) XS Edge (4mm) Last : FZ - Highly Downturned, Highly Asymmetric PROFILE : Highly Downturned Symmetry : Highly Asymmetric Primary Material : Leather SOLE RUBBER : VibramA(R) XS Edge Country of Origin : Italy Product Code : 70090000