Castelli Fast Feet 4 Sock Rosa Giro, L/XL
- BackcountryBrand site$39Buy
The creators who use it, or GearCred, may earn a commission when you buy through these links, at no extra cost to you.
From Backcountry
What Our Gearhead® Experts Are Saying:"I wear the Fast Feet 4 Sock on race day or whenever I’m chasing every second. The aero fabric feels fast, and the footbed fits like a Rosso Corsa—tight, supportive, and super breathable. They stay in place all ride thanks to the grippy cuff."When every second counts, we slip into the Fast Feet 4 Sock. Part of Castelli’s Fast Feet project, this sock is built to reduce drag where it matters most—on the leading edge of every pedal stroke. Engineered Lycra® up top features vertical grooves that help detach airflow, while the polyurethane grip at the cuff keeps the sock locked in place at high speed.
