World-renowned O'Neill quality at value-driven prices. The Basic Skins offers UPF 50+ Ultraviolet Protection with cleanly designed graphics and minimal seam placement for rash prevention.. Key Features of O'Neill Basic Skins L/S Sun Shirt Rashguard: 50+ UPF Maximum Protection. Flexible design which utilizes minimal seam placement for comfort. UPF 30+ Ultraviolet Protection. 6 oz Polyester/Spandex. 4-Way Stretch. Strategic Seamless Paddle Zones. Slim Fit..