Achieve the perfect balance of performance

3-piece lining provides maximum flexibility

and ribbed hems ensure kids stay ready for anything

Ergonomic seam construction enhances the connection of key muscles

Helps improve performance and flexibility

Speedo Biofuse Fitness Fin Size:XS Achieve the perfect balance ofGet more from your training with the Speedo Biofuse Fitness Fin. These comfortable fitness fins feature stiff blades for maximum water resistance and a more challenging lower body workout. Providing extra propulsion to your stroke, they promote better ankle mobility and provide easy speed so you can focus on your body positioning or kick technique. Features Speedo Biofuse technology: for maximum comfort and fit Strengthen leg muscles: added resistance