This is the jersey resulting from the collaboration between Castelli and the Canadian casual clothing brand Vallier. It is based on the Aero Race 6.0 Jersey model. When Castelli engineered the first aero jersey for road racing back in 2006, everyone thought we were crazy. Back then, aero was only for TTs. We're now on the sixth major revision of our aero jersey. Each generation has become more aero and better fitting. The Aero Race 6.0 benefits heavily from CFD analysis of wake flow in the riding position for fabric and seam placement. It also benefits from pro riders' feedback, as we've worked to make the jersey comfortable for their long hours of training and then racing in every possible weather condition. Finally, the design is inspired by Vallier's urban and innovative style.