The fishing line follows DSG Outerwear's core strategy of building women-specific apparel that is functional and fashionable. All DSG Outerwear's UPF fishing shirts are designed by women with input from women fishermen and backed by a woman-owned company! This shirt has UPF 50 sun protection and that is the highest rating on the ultraviolet protection factor scale. UPF measures how much of the sun’s UV radiation is absorbed by the fabric, protecting your skin from overexposure. Don’t let a bad sunburn ruin your outdoor fun; wear a UPF 50 fishing shirt from DSG.