The Under Armour HG ARMOUR COMP MOCK LS men's t-shirt is made of thick but very lightweight HeatGear® fabric that offers excellent compression properties. The top features an elastic mesh panels on the back and on the side for improved ventilation. The innovated ergonomic design with seams placed outside of the high-wearing areas guarantees comfort and a longer life for the T-shirt. The material wicks the sweat away affectively and dries super fast. The anti-odour technology prevents growth of bacteria and eliminates odours.