You'll be ready for warm, sunny days in this short sleeve tee with built-in UPF 50 and sweat-wicking power.. . . . . Comfort Stretch fabric provides full range of motion so you can move freely and comfortably.. Omni-Shade UPF 50 sun protection. Omni-Wick. Comfort stretch. Uses: Trail. 56% Polyester, 37% Cotton, 7% Elastane. Machine wash. Imported.