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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...

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...

Castelli Entrata 18 Socks Product features Polypropylene yarns that don't absorb moisture 60% polypropylene / 20% polyamide / 20% elastane Midfoot support band 18 cm height Technical Features Weight: 48 g Temperature: 10°C - 38°C / 50°F -...

Castelli Entrata 18 Socks Product features Polypropylene yarns that don't absorb moisture 60% polypropylene / 20% polyamide / 20% elastane Midfoot support band 18 cm height Technical Features Weight: 48 g Temperature: 10°C - 38°C / 50°F -...

Fast, sock, always. We set out to make an aero sock that doesn’t compromise on the things that make a great sock. Working with expert Italian knitters and state-of-the-art machinery, we created a structure that combines smooth and textured zones to...

Fast, sock, always. We set out to make an aero sock that doesn’t compromise on the things that make a great sock. Working with expert Italian knitters and state-of-the-art machinery, we created a structure that combines smooth and textured zones...

Fast, sock, always. We set out to make an aero sock that doesn’t compromise on the things that make a great sock. Working with expert Italian knitters and state-of-the-art machinery, we created a structure that combines smooth and textured zones...