Castelli Fast Feet 3 Sock black

Castelli Fast Feet 3 Sock Black Unisex Cycling Socks

The Castelli Fast Feet 3 Sock Black socks are part of the Fast Feet project, dedicated to aerodynamic performance. Designed for road racing or fast rides in warm weather, they offer a real boost in efficiency thanks to an advanced design tested in real-life conditions.

Product Features

• Development from the Fast Feet project of the Castelli brand
• Foot part based on the Castelli Rosso Corsa sock for optimal comfort in the shoe
• Polyurethane support band located at the top of the sock for a perfect fit
• Grooved Lycra® leg section, specially designed to improve aerodynamics
• New upper cut optimized for more comfort and better aerodynamics

Technical performances

• Insulation: 1/5
• Waterproofness: 1/5
• Wind resistance: 1/5
• Breathability: 4/5
• Lightness: 4/5
• Weight: 48 g
• Recommended operating temperature: 10°C to 38°C (50°F to 100°F)

Why choose this product?

Unlike many so-called "aerodynamic" socks on the market, Castelli's Fast Feet 3 Sock is based on real expertise. Each model undergoes dynamic laboratory tests on moving feet, as well as road tests with cyclists, to validate the theoretical results. The result: a measured gain of up to 2 watts at 50 km/h.

Who is this product for?

These socks are designed for performance-oriented cyclists, especially in races, or those who cannot use aerodynamic overshoes. Lightweight, technical, and comfortable, they are designed for those who want to optimize every detail.