Castelli free aero race bibshort kit versionthese free aero race bibshorts have been engineered as castellis premier race shorts their first free aero race debuted many years ago and these bibshorts have undergone constant improvement as castelli develop new fabrics and manufacture methods as well as responding to feedback from pro teams castelli designed these free aero race bibshorts to be as fast as possible by concentrating on helping you get the most out of your body and by optimising a