On the men's side, Castelli's Aero Race jersey has set the standard for race proven, aerodynamic kit for years with other clothing manufacturers scrambling to keep up. Now, alongside version 5. 1 of the men's Free Aero jersey, Castelli is finally offering a women's version to wear with the Free Aero bib shorts. We like to think that the wait for the Women's Short Sleeve Aero Race Full Zip Jersey was simply a process of Castelli using the men's side as a testing ground to perfect the product so we could start with the best. From fit to fabrics, this jersey boasts a pedigree steeped in racing speed with comfort to weather the longest of training rides. Castelli uses stretchy, lightweight, and breathable Velocity dry fabric across the front of this jersey that sits comfortably against the skin to whisk moisture away with fast drying efficiency. This fabric also utilizes a tightly knit weave to manage laminar airflow over the body for watt saving aerodynamics, which will, in theory, translate to less fatigue and more speed out on the road. The back and sleeves are made of 3D mesh, which is lightweight and dimple textured. This increases the fibers' effective surface area without adding mass, allowing for increased wicking and an even faster evaporation. While we wouldn't wear it alone in the depths of winter, this does make the Aero Race Jersey appropriate for cool weather applications as a drier jersey makes for a warmer cyclist. A band of compressive material around the waist maintains the aerodynamic, second skin fit and keeps even fully loaded pockets in place, eliminating the risk of personal effects and ride supplies bouncing or jostling free on an unforgiving surface. A full length front zipper, silicone grip at the hem, and the complement of three rear pockets and a rear zippered pocket add functional elements of fit and convenience, while reflective elements help keep you visible when your ride adventures span into low light portions of the day.