Fill bells with water for neutral buoyancy, or with air for exercises requiring buoyancy.
True 3-D design gives excellent performance in water for any direction or path of motion. These blades are secured around one's leg above the ankle with two-inch wide velcro straps. These are hollow poly-propylene dumbbells with 4 blades at each end for resistance and stability. It has removable end caps that allows the bell to be used for additional flotation or to be filled with water for neutral buoyancy.