Invel High Performance Insoles Size: M size (22.0cm - 25.0cm) Can be cut to fit your size. Brand new, unused Retail price: 12,000 yen • Far-infrared effect • Contains bio-ceramic MIG3®, a patented technology of Invel • Five effects and benefits of bio-ceramic MIG3: 1. Promotes blood circulation 2. Fatigue recovery 3. Relieves muscle fatigue and stiffness 4. Relieves neuralgia and muscle pain 5. Activates the function of the stomach and intestines Outer bag is not included. Stored at home.