Aerodynamic gains the sleek 20 aero jersey is a second skin effect jersey designed for your fastest performances maximising your hard won winter fitness the front is made with artico fabric that is both lightweight and breathable with two way stretch for a close fit the rear is made from lycraka a micro lycra that provides maximum elasticity and perfect freedom of movement anti slip bands on cuffs and a deep bottom hem help keep the jersey in place when in a low tuck position and offer a sl