You'll be the coolest cat in town when wearing the Columbia Women's Short-Sleeve Coolest Cool Shirt. Fit to function under high pressure and with flattering, contrasting seams, this techy tee is ready to face the heat. A trio of Omni tech—Freeze-Zero, Wick, and Shade—cooperate to turn UPF 50 into a moisture-managing, antimicrobial, and actively cooling tee so you can get your sweat on without feeling super sticky.