Under Armour Men's CoolSwitch ArmourVent Patch Cap 100% Polyester Imported Structured crown with a curved visor & adjustable closure for a personalized fit UA CoolSwitch uses an exclusive coating on the inside that pulls heat away from your skin, making you actually feel cool & able to perform longer Lightweight ArmourVent technology delivers true breathability in a stretchy, durable, fast-drying fabric Built-in HeatGear sweatband wicks away sweat to keep you cool and dry