Speedo Men's Breaker Swim Tee Swimsuit Wet Dry Shirt Jersey Black Medium 100% polyester Short Sleeve 100% Polyester Material with Contrast Stitching Block The Burn Protective Fabric that offers UVA/UVB Ray Protection 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