Help you back muscles with this 3-in-1 Self Heating Magnetic Back Wrap and Support Magnetic back wrap with Velcro fastening, self heating and supporting qualities 3-in-1 magnetic, self warming and supporting Comfortable magnetic belt for back pain High quality neoprene with stitched in magnets and gem stones Self heating to help speed up recovery from injuries Fits up to 42 inch waist Support your back with this 3-in-1 Self Heating Magnetic Back Wrap and Support for 9.99 pounds