The Under Armour Men's UA Seamless Long Sleeve T Shirt uses levels of mesh mapped to your body, so you get the ventilation where you need it, plus the comfort of fewer seams. It is made from a soft knit fabric with engineered mesh ventilation and with a nearly sew-free construction to eliminate chafing. Its four-way stretch construction moves better in every direction and its material wicks sweat and dries really fast. The UA Seamless Long Sleeve T Shirt features an anti-odor technology that prevents the growth of odor-causing microbes and a streamlined fit that's not too tight or too loose. The Under Armour Men's UA Seamless Long Sleeve T Shirt is pretty much the most comfortable thing you'll ever train in.