The Royal Robbins Women's Expedition Chill Stretch 3/4 Sleeve Shirt is a versatile and durable choice for birdwatching enthusiasts. This shirt is made from a blend of polyester and spandex, providing stretch and flexibility for unrestricted movement. The fabric is also equipped with UPF 50+ sun protection, shielding your skin from harmful UV rays. The shirt's moisture-wicking and quick-drying properties keep you comfortable in various weather conditions. With its 3/4 sleeve design and functional features, this shirt is perfect for birdwatching adventures.