Fast Feet Sock Size:L/XL Clamp Compatibility: Includes 2 sets

Clamp Compatibility: Includes 2 sets of clamps for compatibility with both 22

As seen on the backs of swimmers everywhere

- Durable PVC Material- Safety valves - Respects all relevant European standards - Contains no dangerous phthalates

lighting up a new path beyond the arc with optimally balanced internal construction

Fast Feet Sock Size:L/XL Clamp Compatibility: Includes 2 setsCastelli's fast feet aero cycling socks are constructed with engineered grooved Lycra to help detach airflow, with the intention of improving aerodynamics for faster riding. The lower portion of the sock is based on Castelli's time proven Rosso Corsa, with the aim to provide comfortable coverage and good ventilation. Around the ankle, the make up changes to that distinctive grooved Lycra, which has a feel similar to a jersey or set of bib shorts.