Speedo Biofuse is engineered to perform with your body, offering superior comfort through fit. The human body combines the structural strength of the skeleton and the flexibility of the muscles. Without one, the other is nothing. Thats the inspiration behind Speedo Biofuse technology, engineering that performs in harmony with the body. By combining a sturdy structure with flexible outer materials, Speedo have created a line of products that offer unrivalled performance, comfort and fit. Speedo training aids are designed to help you get the most from your swim workout. Each training aid will work a particular part of your body, so you can focus on increasing strength, stamina or tone where it suits you.