Made from 100% polyester, they're very durable and will last a long time. The fabric wicks away moisture and dries quickly to ensure a comfy feel. The 40+ ultraviolet protection factor will guard the skin against harmful UV rays. .: Material: 100% moisture-wicking polyester .: Extra light fabric (3.8 oz/ yd² (129 g/m²)) .: Athletic fit .: Tear-away label