2XU approaches athletic apparel from a purely scientific standpoint. Every piece of clothing 2XU manufactures is designed to make you a stronger athlete. The Women'''s Sub Cycle Jersey is no exception.The Sub Cycle solves the problem of optimum athletic performance relatively simply. The front of the jersey is made with a stretchy, aerodynamic fabric called High Fil Sub. 2XU chose this fabric for its efficient moisture wicking properties to keep you dry and cool during hot weather workouts. The back of the jersey is made with Aero Mesh X. As the name implies, this fabric is extremely breathable and allows air to flow freely in and out of the jersey to cool you down. 2XU used anatomically contoured panels for the best possible next to skin fit.2XU also included a full length front zipper that allows you to dump heat quickly. Large rear pockets allow you to comfortable carry ride essentials, and wide grippers at the sleeves and waist keep the jersey in place without irritation.