NRS HydroSilk is the perfect solo layer to wear when the weather gets warm and a great base layer in cold weather The HydroSilks new 8oz material will increase moisture wicking The new 8oz nylonspandex fabric improves moisture wicking to keep you more comfortable HydroSilk has a UV protection rating of SPF 50 guarding your skin from the damaging effects of sunlight Formfitting design allows for unrestricted layering A silky outside and softbrushed inner feels great against the skin