O'Neill  Men's Basic Skins UPF 50+ Long Sleeve Rash Guard Polyester/Spandex Imported Skin Cancer Foundation Recommended Product; UPF 50+ Ultraviolet Protection Perfect For Surfing, Swimming, Paddle Sports, Boating, And Beach Days Comfortable yet durable construction. Flatloc stitched and 6 ounce polyester, spandex four way stretch Minimal Seam Placement For Maximum Rash Protection Performance Fit: Form-Fitting Tight Layer Fits Like A Second Skin