NIKE Lady Dri Fit Cotton Support Bra Running Vest Nike Dri-FIT fabric - wicks away moisture to help keep feet dry and comfortable. Built In Bra Support - adds extra support for maximum comfort and offers a supportive fit for A and B cups Racerback - with mesh for enhanced ventilation and a wide range of motion. Ergonomic Seaming - follows the body's natural contours for reduced irritation and an athletic fit. High elastane content - provides excellent support with great stretch and recovery