The Castelli Free Aero RC Kit Bib Short is built for speed and comfort so that those of us who spend our days training and racing have a dependable kit for every ride, and the rest of us ride in pure comfort for miles on end. The high-compression Forza 2 fabric helps support vital leg muscles, while the seamless Progetto X2 Air chamois provides cushion for long stretches in the saddle. Uniquely engineered aw-cut leg openings eliminate the need for annoying silicone grippers, while the 5-panel construction helps reduce the number of seams so we're not dealing with chafing.