The high dense rubber could reach deeper into the Fascia or tension release. Ball massager provides a greater support than others, even could withstand any body weight. Massage Roller ball is your best tool to roll away the deep muscle Knots in the ball of your foot. The physical therapy will roll away your pain and make your feet light all day. The spiky layer offers a stimulating effect and increases circulation throughout your entire body both Pre and post workout. This will hit all trigger points and rejuvenate all areas of your body. You can train harder for longer.