Designed with a fit inspired by our S-Works model this shoe offers performance-enhancing Body Geometry technology Boa® dial adjustability & our carbon/glass sole for a great blend of performance & value.> FACT carbon/glass fibre reinforced outsole is directionally rigid for outstanding power transfer: 8.5 stiffness index> Performance-enhancing Body Geometry features in the outsole & footbed> Thermobonded synthetic upper construction for light weight & superior supple fit> Lightweight Boa® L4 rotary closure & forefoot Velcro strap for on-the-fly tunability & dynamic fit; features a quick-release lace pull 3-bolt cleat pattern fits Shimano SPD-SL Look Delta & Keo Time & Speedplay