Speedo&reg; Men's Breaker Swim Tee Swim Suit Wet Dry Shirt -Black, Large Short Sleeve 100% Polyester Material with Contrast Stitching UVA/UVB Protective Fabric to Protection from the sun's harmful rays Tighter knit fabric for higher level of protection from the sun's harmful rays Improved fit so over-stretched product does not decrease the UPF rating Dries Quickly