Castelli Free Aero Race S Bibshort Fast Enough for Race Day. Comfortable Enough for Every Day. The Castelli Free Aero Race S Bibshort is design for the top step of podiums, unforgiving training rides, and epic days on the bike. Progetto X2 Air Seamless pad sits at the center of everything this bibshort does well. It handles long efforts without punishing you, which means you can push hard on a five-hour ride and still have legs for the sprint. The Forza2 Stretch fabric moves freely through the pedal stroke without binding or bunching, and wind-tunnel-optimized construction delivers a measurable 3% reduction in Cd A. Lightweight, minimal bib straps keep the upper body cool and unencumbered, while silicone grippers lock the leg ending exactly where it belongs. For riders who want race-level aerodynamics without sacrificing comfort on long training days, this is the short. Features Progetto X2 Air Seamless seat pad top-of-the-line construction with perforated skin layer, seamless integrated padding, and viscous insert for maximum comfort on long rides Forza2 Stretch fabric molds to the body without constriction, moves freely through every pedal stroke Wind-tunnel-optimized construction delivers a verified 3% decrease in Cd A for measurable aero gains Lightweight minimal bib straps supportive and breathable without bulk through the shoulders and chest Silicone leg grippers keep the short positioned correctly without slipping or riding up Race-fit construction European cut, slim through the leg; size up if between sizes | Castelli | Free Aero Race S Bibshort Men's | Size Small In White