Exterior: Cotton and rubber - Interior: Polyester. Reusable, for household use only, one size fits all. Protects the palm from heat contact with hot surfaces (pans, baking dishes, etc.). Use with caution 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.