sweat-wicking support. the nike pro mesh (8y-15y) girls' sports bra has strategically placed mesh and stretch fabric that lifts sweat away from the skin for a comfortable fit and outstanding breathability.. benefits. dri-fit fabric to wick away sweat and help keep you dry and comfortable. racerback for enhanced range of motion. back mesh panel for strategic breathability. stretch band for a snug, secure fit. product details. fabric: dri-fit 88% recycled polyester/12% elastane. machine wash.