O'Neill Men's Basic Skins UPF 50+ Short Sleeve Sun Shirt 6oz Polyester/Spandex 4-Way Stretch Made in USA or Imported Slim Fit: Fits Close to Body, But Is Not Tight Skin Cancer Foundation Recommended Product; UPF 50+ Ultraviolet Protection Perfect For Surfing, Swimming, Paddle Sports, Boating, And Beach Days Comfortable Yet Durable 6oz Polyester/Spandex Construction Minimal Seam Placement For Maximum Rash Protection