High Quality Materials: Made of high quality EVA and cotton material, durable, BPA free, can provide cushioning effect, very soft and comfortable to wear when walking or running. / p> & nbsp; Massage acupuncture points: The insole contains magnets according to the acupuncture points of the human body. By stimulating the plantar acupuncture points, these magnets can promote blood circulation, relieve muscle pain and promote body metabolism. & nbsp; Principle of Magnetic Therapy: Magnetic therapy insoles conform to the principles of human mechanics and kinematics, and produce a certain intensity of magnetic field on the affected parts of the body human. & nbsp; Improve Blood Circulation: Magnetic massage nodes help increase blood circulation in feet and calves, help promote blood circulation, relieve muscle pain, promote metabolism of the body and relieve fatigue. & nbsp; Unisex, guilty size: guilty size, unisex, you can adapt the insole to your shoes according to the previous sole. 29CM (42-48 yards) can be cut