"Apply it to the affected area and feel the Metax effect. A palm-sized gel pack that is convenient to carry. Can be used both hot and cold. The size makes it easy to use anywhere on the body and can be used depending on the purpose. We use Metax technology inside the gel. Product Details Materials: Body film/nylon/polyethylene, gel/water/propylene glycol/CMC, cover/""outer fabric"" 100% nylon, ""inner fabric"" 80% cupro/20% nylon, ""lining fabric"" 100% polyester Technology: Metax Country of origin: Japan"