The present invention has at least three essential layers; an inner layer 406 of a polyamide which preferably forms the interior surface 404 which is in direct contact with and adhers to the meat 401; a core layer 407 of a polyolefin such as an ethylene polymer or copolymer or blends thereof; and an outer layer 408 of a polyamide which preferably forms the exterior surface 403 of the casing of the