For road riding or when wearing Fast Feet overshoes isn't an option, this sock saves you watts.
- Castelli's Fast Feet project, for pedaling even in hot conditions.
- The part of the foot is inspired by the Castelli Rosso Corsa sock for maximum comfort inside the shoe
- Polyurethane strip in the back to keep the sock in perfect position
- The leg part is made of Lycra® with grooves designed to facilitate the outflow of air
