SHERPA ADVENTURE GEAR Women's Rinchen Short Sleeve Tee Shirt 100% Polyester Imported UPF rating of 15 This performance tee is made of a polyester stretch mesh with a denier gradient that moves moisture away from the body to keep you dry Fabric incorporates Polygene technology, which utilizes natural Silver salt to inhibit the growth of odor-causing microorganisms Reversed flat seams for bulk-free comfort. Utilizes anesoftthread, the softest in the market