This Under Armour long sleeve shirt is perfect for men who love to work out at the gym or participate in health - related activities. You can wear it alone for a comfortable workout or under a uniform for added effectiveness. It has a slim fit. The super - light HeatGear fabric is used, and there are mesh panels under the arms and on the back for ventilation. To care for it, machine wash cold with like colors, tumble dry low, and avoid ironing, using softeners, or dry - cleaning.