Abstract: At least three-layered, coextruded, tubular, biaxially stretched seamless tubular casing comprising, viewed from the outside inwards, a) an outer layer A which comprises as the main component a polyamide or a mixture of several polyamides, b) optionally a layer B which has an oxygen-blocking character, c) optionally a core layer C which comprises as the main component a polyamide or a mixture of several polyamides, d) a layer D which has an adhesion-promoting action with respect to the adjacent layer C or B or A and the adjacent layer E and e) an inner layer E which comprises as the main component a polyamide or a mixture of several polyamides, f) optionally further layers and additives, wherein g) at least one layer comprises natural fibres having a fibre length in the range of from 5 to 10,000 ?m and/or a natural fibre mixture of various fibre types and/or fibre lengths. The use thereof as a foodstuffs casing is also described.

Abstract: A one- or multi-layered seamless tubular casing which is permeable to smoke, characterized in that at least one layer of the seamless tubular casing comprises a mixture of polyamide and natural fibres and optionally additives, wherein the sum of the layer thicknesses is between 5 and 200 ?m and the permeability of the seamless tubular casing to water vapour, in accordance with ASTM F1249-01 at a temperature of 23° C. and a relative atmospheric humidity of 85%, is at least 25 cm3/(m2×day×bar), is described.