HeelWrap platform is designed for fool-proof simplicity with a supportive, ride-anything flex; Kink Straps are designed to allow riders to choose from two different ankle strap positions on the boot; Powered by AuxTech, the UltraFlex Pro Ankle Straps feature an overmolded design and open 3D edge for our most powerful, reactive and locked-in feel; Powered by AuxTech, ProGrip Toe Straps provide next level, locked-in hold and grip; AuxTech is a game changing pattern in ankle and toe straps. Auxetic patterns are geometric patterns that become thicker perpendicularly when stretched; Highback Materials: 100% Nylon; Baseplate Materials: 15% Glass, 85% Nylon. A mellow and medium flexing feel for a smooth ride; Forged Aluminum heelhoop for lightweight strength and durability; 2deg Dual-density canting footbed