CASTELLI Fast Feet Socks - White

The Castelli Fast Feet Sock provides an aero advantage for road racing when it's too warm for the faster shoe covers. Castelli takes the leg portion of their TT shoe-cover and stitch it to their most comfortable sock for in-shoe comfort. It's the same as the aero sock Castelli supply to Team Sky, and it's a riders' favorite.

• Castelli's Fast Feet project – for road riding in warm conditions
• The sock portion is based on Castelli's Rosso Corsa sock for in-shoe comfort
• The leg portion is constructed with engineered grooved Lycra® to help detach airflow