Speedo Aquablade Jammer FINA approved style - Fully compliant with FINA regulations. Exclusive to Speedo®. Unique Aquablade fabric offers lower drag co-efficient and is slicker than skin! Stripes create channeling effect to streamline water away from the body. Longer legs for added coverage and compression fit. Drawcord waist. Superior, chlorine-resistant 80% Polyester/20% Lycra® spandex.