The Castelli 6 Fast Feet Booties are your ultimate accessory for when milliseconds count. Part of Castelli’s Rosso Corsa range, these booties have been proven to deliver a six watt saving at 45kmph, compared with a normal sock.

Made to zip over your shoes and calves, the wind tunnel-refined booties are composed from silicone-coated stretch fabric over the shoe, primed to smooth the airflow, and engineered grooved Lycra® on the ankle that detaches the air altogether.

Held in place as you race by flat polyurethane tape at the top, these booties won’t let you down and could make the difference between victory and defeat.

Features:

• Proven in the wind tunnel to save 6w at 45kmph over a normal sock
• Made with silicone-coated stretch fabric over the shoe
• With grooved Lycra® on the ankle
• Polyurethane tape at the top keeps shoe covers in place
• Secured with a YKK® zipper