Hyperthermia with natural mineral tourmaline as the core, comprising the product formed integrally with the nano-bio-functional materials. In the case of temperature and pressure changes, continuous release of far infrared, negative ions. And the thermoelectric micro-current stimulation effects to the human body. Can effectively improve blood circulation, ease muscle fatigue, activation of cell metabolism, dredge the meridians, to wind and dampness, pain to the cold, and enhance the body´s resistance to disease. Products are safe, easy to use, lasting effect. Specification: Material: tourmaline + ceramic powder + heat sensitive materials Color: black+white Size(L x W): 47.5cm x 10.5cm/18.7´´ x 4.13´´ Condition: 100% brand new and high quality Package includes: 1 x neck protector/massager