Speedo Womens LZR Racr Pro Rcrdbrkr Kneeskn W/Cmfrt STRP 1pc. Swmst 75% Nylon/25% Spandex. FINA Approved. New Comfort Strap reduces shoulder pressure. 100% Textile Swimsuit fully compliant with FINA regulations. Fit engineered from body scan data resulting in an optimum biomechanic fit. 3D, 3-Piece Pattern creates the ultimate fit with complete freedom of movement engineered to optimize swimmers' shape., LZR Pulse is exclusive compression fabric reduces muscle oscillation and skin vibration., LZR Pulse is water repellent, chlorine resistant, and fast drying., 4 Way Flat Seam are low profile, high strength stitched seams., Our top competitive back, featuring a lower back and higher cut offers ultimate freedom of motion.