Versatile and high performance in nature, Royal Robbins Diablo makes a great go-to shirt for a variety of activities. It's perforated ventilation fabric at the side panels will keep you cool and on task. The lightweight Diablo protects you from the sun's harmful rays, dries quickly, sheds wrinkles, and looks great. Wrinkle resistant, lightweight performance fabric with UPF 20+ protection and quick drying capabilities make Royal Robbins Diablo ventilation blend ideal for many travel and outdoor pursuits. Material: 50% Polyester, 50% sorona fiber.