The Girls' Nike Pro Sports Bra provides medium support for a variety of training activities. Its comfortable racerback design minimizes distractions, while its tight, compressive fit helps reduce movement during workouts. Dri-FIT technology wicks sweat away to help keep you dry and comfortable. Compression fit for snug support while you work out. Brushed chest band offers an incredibly soft, secure fit. 88% Polyester, 12% Spandex Nike Pro Girls Sports Bra in Black/White Size.