Union Factory Bindings Silver Men's L/XL SONIC FUSED ANKLE STRAPS - All New 3D Direct-Connect core evenly distributes strap pressure and allows lateral freedom. Minimized stitching for better overall durability. STAGE III ATLAS DURAFLEX BASE  LIFETIME WARRANTY - Raw injected, pigment free Duraflex nylon provides increased base stiffness and edge-to-edge response. EXTRUDED 3D ALUMINUM HEELCUPS - Designed for optimum heel hold and minimization of drag  Strongest in the business.