FastskinŽ FSII, the most advanced and lowest drag racing swimwear in the world to date! FastskinŽ fabric mimics the rough shark denticles to reduce drag in key areas and features a Turbulence Management System. 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. Fabric:81% Nylon/19% LycraŽ spandex. Import.