Castelli

Fast Feet 4 Socks

<p data-start="314" data-end="565">The Fast Feet 4 socks are a clear statement: less air resistance, more speed. Developed as part of Castelli's Fast Feet project, they deliver targeted aerodynamic benefits exactly where it counts - on the leg.</p> <p data-start="567" data-end="879">The upper is made of specially structured Lycra&reg; with defined grooves that specifically release the air flow and thus reduce air resistance. This turns a sock into a functional aero feature. A polyurethane gripper at the upper end ensures that everything stays in place - even during intense exertion.</p> <p data-start="881" data-end="1086">In the shoe, Castelli relies on the tried and tested: the foot area is based on the Rosso Corsa sock and offers first-class comfort, reliable ventilation and a snug fit for long hours in the saddle.</p> <p data-start="1088" data-end="1183">The Fast Feet 4 is more than just a sock - it is a functional part of your race set-up.</p>