Fabric: 100% Polyester Design: Flatlock Seams Prevent Chafing; Sleeve with Thumb Hole. UPF 50+: Excellent Protection from the Harmful Effects of the Sun's UV Radiation Breathable and Quick Dry: Breathable Fabric for Sports Wear and Lightweight Shirt for Skin Friendly; Special Material Dries Quickly. Suit For: Running, Workout, Fishing, Sailing, Camping, Hiking, Surfing, Athletic Wear, and Outdoor Activities.