In the past, performance cycling jerseys were all about moisture management with little to no attention given to aerodynamics - that was a consideration for time trialling only. Baggy cycling jerseys were the norm until the very first Castelli aero focused jersey appeared- named the Split Second. However, with every new version of the jersey, the aerodynamic advantages have proved to be worth far more than just split-seconds. The Aero Race 6.0 Jersey takes speed up a notch.