Manufactured by plant extracts. Adopts unique moxibustion heat therapy. It's self-heating, it can penetrate deeply into the muscle right where it hurts. When it's applied to your skin, it actually reduces the sensation of pain. Heat stimulates thermo receptors which block body's pain transmitters from sending pain signals to the brain. Heat increases circulation to the injured or sore area, which means more oxygen and nutrients are sent to the damaged tissue. Heat helps to stretch the soft tissues, relax muscles, which promotes flexibility and helps to decrease stiffness. It also has great effect in improving blood circulation. It has long been used as a natural remedy to relieve pain and reduce joint stiffness.