A one-piece, body-hugging, next-to-skin, aerodynamic suit, the Assos Men's cS.Uno_S5 Cycling Chronosuit is anatomically cut for the aerodynamic, time trial position. Once created by special request for professional riders, cS.Uno is now available to everyone Made from low air resistance spandex and breathable, 4-way stretch panels, the suit conforms to your body when in the time trial position. A.Plethon fabric on the upper body turns your body into an aerodynamic machine. The short features a S5_UNO insert for comfort, inner mesh pocket for your race radio, and a small zipped pocket on the outside. Put the cS.Uno on, and wear the world's most aerodynamic suit.