• Self-heating knee sleeve designed to improve blood circulation and relax muscles. • Contains tourmaline and other natural ingredients believed to stimulate legs and relieve pain. • May help to massage acupressure points on thighs and relieve arthritis pain. • Designed to improve blood circulation and metabolism. • Can massage acupuncture points of the leg to relax body organs. • Intended to promote relaxation and improve sleep quality. • Suitable for both men and women. • One size fits most.