wherein in the present case the two first longitudinal threads when viewed in a projection which is perpendicular onto the fabric layers 1 2 are disposed so as to be only slightly offset in relation to one another such that said two first longitudinal threads mutually overlap in the present case the ratio of first longitudinal threads to second longitudinal threads is 13 10 1 3 as can be identified in fig1 e the two fabric layers 1 2 are disposed on top of one another and the first longitudinal threads 3 and the second longitudinal threads 4 are disposed in a plurality of groups 5 6 in the present case three first groups 5 and two second groups 6 are formed here that is to say that one superordinate group of longitudinal threads is formed by three first groups 5 and two second groups 6 immediately successive first groups 5 are in each case separated from one another by one second group 6 in the present case each of the first groups 5 is constructed from one first longitudinal thread 3 and disposed therebelow one second longitudinal thread 4 wherein in the present case the first and second longitudinal threads 3 4 when viewed in a projection which is perpendicular onto the fabric layers are disposed so as not to be offset in relation to one another the second.