Columbia Women's Saturday Trail III Long Sleeve Shirt Omni-WICK Flex Stretch Woven 86% polyester / 14% elastane Imported Omni-Wick Shirt Omni-Shade UPF 40 sun protection 2-way comfort stretch. Vented Roll-up sleeve Stash pocket Omni-Wick Evaporation Omni-Shade UPF 40 sun protection 4-way comfort stretch Stash pocket