The invention concerns multilayered biaxially stretched and thermoset tubular films composed of an inner layer (A) comprising at least one thermoplastic copolyamide as an essential component, at least one intermediate layer (B) which is composed of a polyolefin homo- or copolymer, and an outer layer (C) which is composed of at least one thermoplastic polyamide as an essential component. The tubular films are characterized in that the layer thickness ratio of (C) : (A) is between 5 : 1 and 2 : 1.
