The Royal Robbins Women's Expedition Chill Stretch 3/4 Sleeve Shirt is a versatile and functional option for birdwatchers. Made with a blend of polyester and spandex, this shirt offers stretch and flexibility for unrestricted movement. It has UPF 50+ sun protection to keep your skin safe from harmful rays and features a cooling fabric that wicks away moisture and dries quickly. The shirt also has a hidden zippered pocket for storing small essentials. Whether you're birding in hot or mild weather, this shirt will keep you comfortable and protected.