The CoolSwitch Thermocline Quarter-Zip Pullover boasts Under Armour's revolutionary CoolSwitch technology, which helps cool your body and skin so you can perform longer. Rugged 90% polyester, 10% elastane HeatGear fabric has built-in UPF 30+ sun protection to shield your skin against harmful UV rays. ArmourBlock technology helps neutralize odor-causing microbes so you stay smelling fresh. Strategic ventilation at the under-sleeves and side panels lets air circulate to further keep you cool in the heat. This classic, warm-weather top features a mock-neck collar, quarter-length front zipper, an iconic "UA" screenprint logo at the left chest, and vertical "Under Armour" lettering at the center back. Loose fit. Imported.