Patagonia's most technical long-sleeved button-up fishing shirt, designed specifically for hot-weather situations and built from an ultralight blended stretch fabric with 30-UPF sun protection.Made from an ultralight, quick-drying 2.3-oz 52% nylon/48% polyester blend with mechanical stretch and 30-UPF sun protection, the Long-Sleeved Sun Stretch Shirt blends cool-wearing comfort with technical performance for warm weather fishing. Two vertical-zip chest pockets hold anything you need to access quickly, and feature mesh backing for improved ventilation and drainage; the zippers are durable plastic to prevent corrosion in saltwater environments.