Gaps ONSU Hot Water Heating Mattress/Floor Combo Thick Pad - Twin Bed Size (Single)

This hot water mattress pad is very unique yet used by Korean for many many years. It came from concept of use hot boiled water through copper tube under house floor, which makes floor to be heated to control temperture of house, not using air heat which dry your skin. Using this pad will not only make you calming and soothing in bed but help your muscle relaxation and take away your back pain and neck pain as well. Ask any Korean friends. They will tell you how good this is. There is a controller that control temp. and automatic shut off function. You only need to fill water once every 6 months or so. Once you fill during winter use, you are done.