Sixs - SML2 Sleeveless Jersey Carbon UnderwearSIXS Carbon Underwear sleeveless jersey, an essential product suitable for all conditions, both indoors and outdoors . 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). Skin always dry and fresh