Under Armour Men's HeatGear Supervent Armour Short Sleeve Compression T-Shirt 92% Polyester/8% Elastane Imported UA CoolSwitch uses an exclusive coating on the inside that pulls heat away from your skin, so you actually feel cooler Breathable ArmourVent mesh back panel is ultra-durable & delivers superior ventilation 4-way stretch construction moves better in every direction Material wicks sweat & dries really fast Anti-odor technology prevents the growth of odor-causing microbes