Patagonia W's LS Sun Stretch Shirt A stretchy and ultralight button-up fishing shirt, designed specifically for hot-weather situations and built from a fast-drying blended fabric with 30-UPF sun protection. Features * Ultralight 52% nylon/48% polyester blend dries in a flash and offers 30-UPF sun protection * Mechanical stretch fabric allows for greater comfort and ease of motion while casting * Hidden zip-closure security pocket on the left chest * Sunglass wipe panel on front interior