This Under Armour short - sleeve shirt is perfect for employees as a gift or for distribution at recruiting events. It's designed for men who want both comfort and style. Made of 53% Nylon and 47% Polyester, it has a slim, streamlined fit. The shirt features UA RUSH infrared technology to boost your performance. Its soft knit fabric with mesh ventilation and nearly sew - free design ensure a comfortable experience. Just machine wash it cold with like colors and tumble dry low.