Here's what other sites are saying:
The Nike Pro Core sports bra offers a snug, supportive fit for active girls, with sweat-wicking, quick-drying Dri-FIT fabric. Dri-FIT fabric is a combination of recycled polyester and spandex that evaporates moisture quickly for cool, dry comfort. Racer-back design boosts support while encouraging full range of motion. Flatlock seams discourage uncomfortable chafing. Nike Pro Core sports bra is machine washable.