Speedo Fastskin FSII Recordbreaker (Youth) FINA approved style - Fully compliant with FINA rules. Fastskin FSII, advanced and low drag competition swimwear. Inspired by the sleek, hydrodynamic properties of sharkskin. Fastskin 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.