The 8-oz. Nylon-spandex fabric that makes up this Girl's HydroSilk shirt will increase moisture wicking! HydroSilk shirts are great layering pieces or Great by themselves for sun Safe guardion. 8-oz. nylon/spandex blend wicks moisture away so you stay dry and nice. SPF 50 UV Safe guardion guards your skin from the sun's harmful rays. Form-fitting design allows for unrestricted layering. A silky outside and inside feels great against the skin. Built specifically for a woman's body, this top will become your most versatile layer.