UA CoolSwitch uses an exclusive coating on the inside that pulls heat away from your skin, so you actually feel cooler. UA Microthread technology in the fabric dries faster, wonât cling to you, wonât chafe & stretches without absorbing sweat. UPF 30+ protects your skin from the sun's harmful rays. Material wicks sweat & dries really fast . Anti-odor technology prevents the growth of odor-causing microbes. 2-button placket for clean, modern look. Iridescent foil logo.