As a long-time consultant to athletes, members of the Davis Cup and other professional sports teams, world renowned orthopaedic surgeon and sports medicine specialist, Dr. Donald Fareed M.D., designed Band-It based on 20 years of clinical observation and treatment of repetitive stress injuries. Band-It can be used to effectively treat tennis elbow, medial or lateral epicondylitis or supinator muscle strain without cutting off circulation or hampering movement. Band-It places pressure selectively across the extensor, flexor and supinator muscles and uses the natural movement of the forearm to gently pump soreness and swelling away. Universal size. Incorporates two magnets +/- 650 gauss that aid in circulation and help the body heal itself.