The Columbia Zero Rules Short Sleeve Tee is super cooling with feminine flair. It was rated Gear of the Year 2013 by National Geographic Adventure. Short sleeve V-neck Modern classic fit Omni-Freeze ZERO sweat-activated super cooling Omni-wick Omni-shade UPF 30 sun protection Comfort stretch Antimicrobial 24.5 inch center back Replaces style: al6811 100% Polyester