Speedo biofuse junior swim training fin the speedo biofuse junior swim training fin are perfect for aiding in training for that extra boost in confidence and power the large surface of the speedo biofuse junior swim training fin and efficient build allows the speedo biofuse junior swim training fin to produce exceptional power for size complete with an easy fit design and comfort touch so that you can swim length after length speedo biofuse junior swim training fin speedo branding