Relax after a long day or a tough workout with the Pro-Tec Dr. Cohen's Acuback Massage Ball. This heatable deep-tissue massage ball offers relief from headaches, shoulder pain, fibromyalgia, back pain and sciatica, as well as neck, leg, hip and foot pain. Made of plastic. Pro-Tec Dr. Cohen's Acuback Massage Ball Blue - Exercise Accessories at Academy Sports