SHERPA ADVENTURE GEAR Women's Dikila 1/4 Zip Tee 82% Nylon, 18% Polyester Imported Raglan sleeves have flat-locked seams to reduce chafing that can occur under packstraps Fabric Blocks 99 percent of UV Rays Woven with anti-bacterial Silver ions to minimize odors Raglan sleeves have flat-locked seams so they won't chafe under pack straps