DR-HO's Neck ComforterThe average head weighs 10 to 12 lbs and the neck and shoulder muscles work very hard to hold the head up. This repetitive use of the muscles along with daily work, physical stress, improper sleeping habits, poor posture, previous neck injuries and emotional stress can all cause neck muscles to tighten with time. When it is partially inflated, DR HOS Neck Comforter functions like a neck support and provides neck support to your own comfort level.