Smoke and water vapor permeable food casing made of a thermoplastic mixture with a natural appearance

The invention relates to a single- or multilayer food casing made of a thermoplastic mixture, which is at least one or contains at least one aliphatic polyamide and / or copolyamide more synthetic water-soluble polymers and at least one organic and / or inorganic filler, wherein the sheath has a permeability to water vapor, determined according to DIN 53122, having the non- or mono-oriented state of 100 or more to 1500 g / m