Under Armour Coldblack Hammer Stripe Polo - Men's 30+ UPF protects your skin from the suns harmful rays Yarn-dyed fabric is stretchy, light & breathable so it can handle the hottest days Anti-odor technology prevents the growth of odor causing microbes Moisture Transport System wicks sweat away from the body Revolutionary coldblack technology reflects IR & heat rays, so even dark color dont get as hot