Engineered for top-level racers who value aerodynamics and comfort, the Castelli Free Aero RC Pro Limited Edition Bib Short uses a high-compression fabric that provides exceptional muscle support with a 5-panel design to minimize discomfort from unwanted chafing. It also features the soft, well-padded Progetto X2 Air seamless seat pad for unmatched support in the saddle; that way, the focus is entirely on our ride.