Fastskin FSII is the most advanced and lowest drag racing swimwear in the world to date! Fastskin fabric mimics the rough shark denticles to reduce drag along key areas of the body. Grey Flexskin fabric splices allow greater flexibility and less drag. These fabrics were positioned to accomodate the changing flow conditions along the swimmer's body. Features a Turbulence Management System with vortex controllers on chest to reduce drag. Fabric: 81% Nylon/19% Lycra spandex. Import.