From Under Armour, this shirt features: short sleeves loose, performance fit Moisture Transport System wicks sweat & dries fast yarn-dyed fabric is stretchy, light, & breathable so it can handle the hottest days anti-odor technology prevents the growth of odor causing microbes 30+ UPF protects your skin from the sun's harmful rays revolutionary coldblack technology reflects IR & heat rays polyester/spandex machine wash Imported.