Clay pack is a new style of hot and cold product. Instead of traditional gel, we use natural clay to provide hot or cold therapy effective. The clay pack of back is highly efficient in the treatment of a wide variety of pain discomforts such as arthritis, sports injuries, muscle pain, joint stiffness and menstrual cramps. It capitalizes on the efficiency of radiant energy to create deep penetrating, therapeutic pain relief. Clay pack of back is very suitable for adult or old man. It can provide steady and long warm.