C-Rest Neck MassagerC Rest is the only affordable, portable, lightweight, non electric neck massager on the market that is easy to use and designed by doctors and chiropractors to help relieve muscle tension caused by the shoulders and upper back. To improve the quality of your life. Use 10 20 minutes per day, precisely aim at the massage points, relax on your back, rely on the gravity of the head to play the role of natural traction stretching, and twist the neck to