the under armour is our original high-performance baselayer, the thickness you put on first and take off last. So we´ve made it ultra-comfortable because it wicks away sweat and is highly stretchable to give you more freedom of movement in all circumstances. compression: ultra tight second skin cut ultra-lightweight heatgear material provides optimal protection without weighing down the body.mesh panels at the armpits and back for strategic ventilationperspiration-removing and quick-drying materialergonomically designed to avoid seams in friction areas and to increase strengthhybrid raglan sleeves for superior freedom of movement and comfortmodel number: 1361524label on the back of the neck to write your initials or your number.main material: 84% polyester / 16% elastanemesh: 92% polyester / 8% elastaneimported productmachine wash in cold water with similar coloursuse only non-chlorine bleach if necessary.machine drying at low temperaturedo not irondo not use fabric softenersdo not dry clean