For road rides or when it is not possible to wear fast feet covers, this sock saves you Watt.

Product characteristics

• Fast Feet project of Castelli, for a ride even in hot conditions.

• The part of the foot is inspired by the Castelli Rosso Corsa Calzino for maximum comfort inside the footwear

• Polyurethane strip in the rear to keep the sock in perfect location

• The part of the leg is made of Lycra with grooves designed to encourage the outflow of air

• Temperature:10 C – 30 C / 50 F – 86 F

• Fit:Aero