Finis' Axis Buoy has a unique design compared to normal pull-buoys. With ergonomic keyholes and a contoured design, the Axis Buoy can function as both an ankle float and a leg buoy. When used around the ankles, the buoy forces swimmers to practise the correct body position without the vertical decline from head to toe while pulling. The Axis buoy also helps improve upper body strength and core stability. The lightweight EVA foam is lightly textured for a more secure grip and allows swimmers to easily transfer the buoy between ankles and legs.