Under armour heatgear armour ss topthis mens heatgear armour compression top has short sleeves and has been designed with state of the art fabrics and panelling to deliver compression without sacrificing breathability made from heatgear fabric this compression top is comfortable enough to be worn all day and has stretch mesh underarm panels so your body can regulate its own temperature the moisture transport system wicks sweat away from the body and anti odour technology helps defend against