ERGONOMIC KEYHOLES Easy to transfer the buoy between ankles and legs STREAMLINED CONTOURS Fits comfortably between legs PROMOTES ELEVATED BODY POSITION Lifts the hips and legs for proper technique BUILD UPPER BODY STRENGTH Immobilizes legs， shifting focus to build upper body strength IMPROVES HIP ROTATION Calls for focus on the hips while pulling to build core strength LIGHTWEIGHT EVA FOAM Does not chafe or irritate skin， slightly textured for a more secure grip PATENT PENDING