The Assos RSR Socks S11 are World Tour level racing socks built with medical-grade compression and ultralight construction for high output efforts in the heat. Developed and refined through pro-level feedback, they use smooth InfraRed yarns with a high elastomer content to deliver 25mmHg of targeted compression from foot to lower leg, enhancing circulation and support over long distances. The seamless 240-needle construction eliminates friction for a low-profile fit, while the 21cm cuff adds a clean finish that integrates into any Racing Series kit. The Assos RSR Socks are some of the best money can buy for cycling performance.