The Speedo Fastskin Cap uses the latest Speedo technology to engineer a Fina approved racing cap that will reduce drag & works in harmony as part of the Fastskin range. Features FINA Approved The first true 3D cap created by Speedo Aqualab & based on accurate global head scanning data Designed for real head & face contours enhanced drag reduction enhanced comfort enhanced accuracy of fit If you have long hair, we recommend you wear with the Hair Management System (worn under the cap) 100% Silicone