pedac master art.186 Size: 42 UK / 9L / 8M US / 12L / 9M JP / 26cm Quoted from the product packaging below: ↓↓↓ Made of natural, durable jute felt material that absorbs shocks remarkably well. Features three-dimensional molded felt to support the foot, with non-slip properties. Ideal for safety shoes. The design, based on orthopedic principles, eliminates fatigue in the heel, arch, and forefoot. [Materials] Surface: Jute felt (jute) Activated carbon filter Back: Latex foam, polypropylene Includes a carbon filter for high deodorizing effect. Caution: If you feel any pain in your feet, discontinue use immediately. Choose the size that fits your shoes. Packaging has some damage.