PRODUCT DESCRIPTION The dual-function design of the Axis buoy improves body position while building upper body strength and engaging the core muscles. With ergonomic keyholes and a contoured design, the Axis buoy can function as both an ankle float and a leg buoy. The lightweight EVA foam is lightly textured for a more secure grip and allows swimmers to easily transfer the buoy between ankles and legs. FEATURES & BENEFITS ERGONOMIC KEYHOLES - Easy to transfer the buoy between ankles and legs STREAMLINED CONTOURS- Fits comfortably between legs PROMOTES ELEVATED BODY POSITION - Lifts 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 hips while pulling to build core strength LIGHTWEIGHT EVA FOAM - Does not chafe or irritate skin, slightly textured for a more secure grip MULTIPLE SIZES- Small (L 25 cm, W 6.8 cm, D 13.5 cm) , Medium (L 29.5 cm, W 8 cm, D 15.8 cm)