Outer: Cotton and rubber - Inner: Polyester. Reusable, for home use only, one size fits all. Protects the palm from heat contact with hot surfaces (pans, baking trays, etc.). Use carefully and only for short moments. Does not protect against cuts, abrasions, or punctures. Do not come into direct contact with flames. Not suitable for food contact. Heat resistant up to a maximum of 250°C.