Men's Columbia Fork Stream Long Sleeve Shirt, Navy From the Columbia website: STAY DRY Built with our sweat-wicking, fast-drying technology, this technical long sleeve is a must on warm days. STAY PROTECTED Featuring UPF 50 protection, the sun won't have anything on you. Omni-Wick™ Omni-Shade™ UPF 50 sun protection Center Back Length: 29" Uses: Water, Trail Imported Recommended Protection The Skin Cancer Foundation recommends this fabric as an effective UV protectant only for covered areas.