SIXS original carbon underwear® short-sleeve round neck jersey, a multi-sport product ideal in all conditions. Unlike the sleeveless model, the sleeve hugs the upper part of the arm (armpit) which is subject to copious perspiration and keeps the skin dry. The lightest and most breathable polypropylene fiber on the market combined with a real carbon yarn that provides heat transmission and antistatic properties that protect the body from the electric charge caused by rubbing multiple synthetic fabrics against each other (condition typical of sports clothing).