SYROKAN Women's High Impact Workout Running Powerback Support Underwire Sports Bra 92%Polyamide,8%Spandex Controlled stretch helps stabilize core while allowing full range of motion Comfortable, no pads, non abrasive underwire Wide, smooth bottom band adds extra support and comfort Cooling keyhole in back & adjustable closure for easy on/off. Breathable power-mesh sides stretch for flawless fit