The Castelli Rosso Corsa 13 is a fantastic pair of cycling socks. The Rosso Corsa offers a large difference in foot comfort. Most of the sock is made from Air Mesh, which ensures optimal ventilation. There's a band around the bridge of the foot, offering some proper support. The cuff at the ankle is 13 centimeters long and uses a folded strap, allowing the elastic to stay in place perfectly.