Castelli free aero race bibshort team versioncastellis first free aero race bibshorts made their debut back in 2007 and have been developed as their leading race bibshorts since then they have undergone frequent improvements as castelli develop new fabrics and development methods whilst also responding to feedback from pro teams they were designed to be as fast as possible by concentrating on helping the rider get the most out of their body by optimising aerodynamics and making them comfort