UA Women's Vanish Softball Pants UA Microthread fabric dries fast, won't cling, stretches without absorbing sweat & is recyclable. Material wicks sweat & dries really fast. Seven belt loops, working fly & double front enclosure. Dual-layer knees & upper back of legs deliver added durability. Super-. comfortable waistband stretches so you can move through your swing. Open back pockets. 100% Polyester.