Coolmax polyester wicks moisture away from the body to the fabric surface for evaporation. Two-ply underwire cups boast three rigid built-up seams to anchor the and minimize bounce for high-impact workouts Supportive leotard back has convertible shoulder straps for wear rackerback or regular Designed to be worn for any workout See size chart 32B white I own this bra and it is amazing for both working out or even everyday wear. No returns 55