DescriptionBEAT THE HEAT A lightweight shirt designed to perform and protect on the water, on the trail, or around town.KEEP YOUR COOL Touch-activated cooling fabric combines with sweat-activated evaporative cooling in our most advanced cooling tech yet.CAST AWAY Four-way comfort stretch, moisture-wicking fabric, and built-in UPF 50 deliver all-day comfort.New Omni-Freeze ZERO Ice™ advanced coolingOmni-Shade™ UPF 50 sun protectionOmni-Wick™4-way comfort stretchShell: 100% polyester Shell: 94.0% Polyester, 6.0% ElastaneActive Fit: Body skimming fit with end-use mobility in mind. Columbia Men's Zero Ice Cirro-Cool™ Short Sleeve Shirt - A One Clothing