The Naboso Neuro Ball is a fabulously designed massage ball, deep tissue release ball, and neuro stimulation ball all in one. Naboso's proprietary "Activation" material covers the outside surface, and the ball separates at the center into two dome shapes that can be used to target specific areas of the body. A smaller firm ball is hidden in the center that can be used to target harder-to-reach areas between the small bones of the feet or hands.