Berlei Ultimate Performance Contour Underwire Sports Bra (Y599W). The Berlei Ultimate Performance Contour Underwire Sports Bra Y599W is designed for high impact sports and features encapsulation styling, moisture wicking fabric and convertible straps that can be worn traditional, crossed back or with an attached j-hook for an instant racerback. Excellent support for running, kick boxing and other high intensity activities. Berlei's Ultimate Performance Contour Underwire Sports Bra Sports Bra is made of nylon/elastane.