Speedo Women's Power Plus LZR Fit Closed Back One Piece Swimsuit 79% Nylon, 21% Spandex Imported Racing leg height Power plus fabric provides added compression increasing muscle support for added power and quick recovery Three levels of bust support provide a comfortable, athletic fit for your swim workout Chlorine resistant, fitting perfectly and retaining shape after use Seam construction improves linkage of the muscular kinetic chain - helps maintain optimal position while lap swimming