For road racing or when you can't wear a Fast Feet TT Shoecover, this sock saves watts.
Product features
- Castelli's Fast Feet project — for maximum aerodynamics
- Foot portion based on Castelli Rosso Corsa Sock for in-shoe comfort
- Polyurethane grip strip at top to keep sock in place
- Leg portion constructed with engineered grooved Lycra® to help detach airflow
Technical Features
- Weight: 48 g
- Temperature: 10°C - 38°C / 50°F - 100°F
- Fit: Race
