Castelli aero race 51 jersey full zipcastelli began the aero jersey revolution in pro cycling and continued to perfect the aero race 51 this version builds on race leading aerodynamics making the jersey more comfy resilient and the most aerodynamic jersey castelli has ever made the fabrics on the front and back have been updated and showed a 2 watt gain during wind tunnel tests compared to the previous version lightweight and comfortablethis jersey is not just aerodynamic its extremely li