DeFeet International Cyclismo 5-Inch Trico Sock, Black/White, X-Large Aero Speed Cuff: All-new mesh pattern is tough, light, provides perfect fit and breathes well Thermo Degree Cool Duo regulation: Provides superior evaporation and comfort in wider range of temperatures Aerator Mesh: The weave that lets feet breathe freely Moisture wicking: Pulls moisture away from skin for a dry-feel and comfort that lasts the whole ride Meta-Pad: Reduces vibration for a smoother ride