Make a difference with the Castelli Fast Feet 4 Socks featured here at Escapa. This model is part of Castelli’s Fast Feet aerodynamic project and is designed to give you a real competitive edge, thanks to its optimized construction, tested to improve efficiency and reduce air resistance with every pedal stroke.
Developed and Tested Aerodynamics
This model is part of Castelli’s Fast Feet project, a program in which all components have been tested under real-world conditions and in motion, replicating the leg’s natural cycle during pedaling. As a result, this sock can save up to 2 watts at 50 km/h—an improvement proven in tests with real cyclists.
Performance and Lightweight Design
Weighing just 48 g and with a recommended temperature range of 10 °C to 38 °C, they offer an ideal balance between breathability, lightness, and aerodynamic efficiency.
Details
- Weight: 48 g
- Temperature: 10°C – 38°C
- Fit: Race
