Biofuse technology is designed to work with your body to deliver a more comfortable fit, working like a natural extension of your body. The Speedo Biofuse Swim Training Fins feature a dual density design with a soft footbed combining with a stiff blade for better comfort and power. The fins assist in training by strengthening lower leg muscles with greater water resistance and enhancing foot flexibility. Biofuse technology delivers superior fit and comfort Dual-density design features a soft footbed and hard blades Increases leg strength and ankle flexibility Increases speed through the water Features Biofuse construction ensures ideal comfort Dual density design with soft footbed and solid fin
