The UV protective performance of this yarn is up to 50 + UPF rating,permanent and safe. Fabric made with this kind of yarn can reflect and absorbUV up to 98%, absorb and reflect infrared rays, protecting people from suntanand reduce the temperature under solarization. Morever, the yarn haspentalobal cross section, which is prone to catches moisture, moves it awayfrom skin and release it for quick evaporation.Specifications: DTY 110 Dtex/72F, DTY 167Dtex/72F, DTY 260Dtex/144F, DTY333Dtex/144F