NIKE Lady Pro Hypercool Flash Support Sports Bra Nike Dri-FIT fabric - Wicks away moisture to help keep you dry and comfortable. Mesh Ventilation - The unique open back design offers excellent ventilation for lightweight comfort and a flattering look. Superb Support - The compression fit and nylon stabilizers inside the straps are less stretchy to help minimize bounce. An internal support frame provides extra holding power. X-Back Straps - Sit higher on the back for optimal range of motion and comfort during upper-body movement. Nike Pro Cool Apparel - Offers all the benefits of Nike Pro clothing, plus highly ventilated construction for maximum airflow in the hottest weather. Strategically placed, larger ventilation pores and a looser fit move heat and moisture away from your skin and draw fresh air into major heat zones as you move, helping to keep you cool.