What is the Advantage of Massage Slipper?1. blood circulation and metabolism. Relief Plantar Faciitis, high heel foot2. Release aches such as headaches, migraines, neck , foot , backaches.3. Promotes better blood flow to enhance overall health4. Reduce tension, improve sleep qualityItem Type: Massage & RelaxationApplication: FootColor: BrownMaterial: Artificial PUSize:M, Suit for Size 39-41Tips:This is Acupressure massage sandals NOT FOR all day wear. If you are new for foot massage, you may feel painful in the beginning few . add socks and start with 5 minutes first. Gradually add the wearing time to 15-20 minutes per day.Package Contents:1 pair * Massage SlipperOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.