Columbia Women's Collegiate Bahama Long Sleeve Shirt 100% Nylon Handy pockets and helpful performance features like venting and UPF 30 combine with simple styling and clean lines to deliver a hard-working fishing shirt fit for the discerning sportswoman Omni-Shade UPF 30 provides maximum protection for long hours in the sun Hidden venting at mid back keeps the cool air flowing through Quick dry fabric for functional performance on the water Fabric: Omni-Shade 100% nylon