One for all this jersey is an evolution ofcastellis pro racing jersey from just four years ago its also castellis first aero race jersey that didnt get retired when the next generation of faster more aero jerseys came along the aero race 40 jersey was very fast but also amazing mix of classic good looks and a stretchy fit work on a lot of body types not just the skinny racer for the 41 version castelli have takin it a different direction away pro racing by giving it convenience fea