* GOOD FOR DEEP TISSUE MASSAGE: You can position the ball on a wall and lean, press, and roll it hard into the knots on your back, shoulder, or neck. It doesn’t slip. Four-corner hand-held massage ball is small enough for you to work on specific knots in your back, shoulder, and neck muscles. It allows a MUCH BETTER deep tissue massage than a lacrosse ball. * MASSAGE ANYWHERE: Perfect for use while sitting on any chair, laying in bed, on the floor, or on a yoga mat. Use them at home,at the office, or at the gym. Small, portable and easy to bring along on any trip. * IMMEDIATE BENEFITS FOR YOUR BODY: Self myofascial release eliminates muscle knots and tension. Trigger point therapy massage lacrosse balls relieve sore and tight muscles to rejuvenate and revitalize all areas of the body. Perfect to get those hard to reach places where you are feeling tight or you know there¡¯s a knot in there.