Speedo Men's Endurance Lite Fly On Brief Swimsuit 51% PBT/49% Polyester SPEEDO Flipturns Fly On Brief (24-32 Only) SPEEDO Flipturns Fly On Brief (24-32 Only) SPEEDO Flipturns Fly On Brief (24-32 Only) SPEEDO Flipturns Fly On Brief Features: Endurance Lite has all the performance properties of our Endurance+ fabric in a 10% lighter weight that won't weigh you down in the water.