Utilizing new yarn technology and construction, this long sleeve tee wicks away moisture three times faster than any product currently available in the market. It offers a sun protection rating that far exceeds UPF 50+. The Polyester/Spandex (91%/9%)fabric content provides exceptional comfort and 4-way stretch. This Extreme Performance tee is also eco friendly, made of up to 12 recycled plastic bottles. Sublimation Friendly. What more could you ask from the ultimate performance tee? 4.1 oz.