When castelli first introduced the aero jersey to the pro peloton in 2007 it was seen as radical by 2009 all the pro teams were jumping on the bandwagon and in the following years the aero revolution steadily spread to more and more cyclists the castelli aero race womens short sleeve jersey fz is the womens version of their full worldtour level aero race jersey the fastest jersey theyve ever tested but castelli havent limited it to racing it has a full length front zipper for easy ono