REI Co-op Sahara Pattern Button-Up Long-Sleeve Shirt Size: M Color: Purple Style/Features: Button Up, Long Sleeve, Vented, Outdoor Hiking Shirt, Fishing Shirt Fabric: Main Body: Nylon Spandex. Panels: 100% Polyester. Provides great coverage when you're recreating outdoors in the full sun. Wear for hiking, trecking, fishing, touring, bouldering, climbing, leaf - peeping, apple picking, visiting the pumpkin patch, etc... plus, it breathes, wicks moisture, and dries fast to keep you as comfortable as possible.