HeelWrap platform is designed for fool-proof simplicity with a supportive, ride-anything flex; ProFlex Ankle Straps, powered by AuxTech, provide advanced hold, energy transfer and connected comfort; 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; 0deg Canting footbed