The Men's Patagonia Long-sleeved R UPF Top is a surf shirt made from light and fast-drying 85% recycled polyester and 15% spandex jersey with four-way stretch and 40+ UPF sun protection. Designed for chafe-free comfort during paddling, it features a self-fabric crewneck, flatlock seams, and seamless underarms for a smooth next-to-skin feel. Functional elements include a boardshorts connector at the center-front hem, thumb loops on the cuffs, and a key loop for added convenience. The close-to-body fit provides maximum comfort and reduces drag in the water.