Speedo Biofuse is engineered to perform with your body, offering superior comfort through fit. The interaction of structure & flexibility result in enhanced performance, comfort & fit. These Biofuse Finger Paddles are designed to help you get the most from your swim workout, working on your upper boody strength & power. Features Made with Speedo Bio FUSE technology for maximum comfort & fit Engineered for maximum resistance in water Increases upper body strength & power Ergonomically engineered shape for enhanced grip & reduced hand fatigue Stiff blade with thermoplastic rubber overmoulding for optimum power transfer & comfort Paddle: polypropylene & thermoplastic rubber, Strap: silicone