A non-woven fabric containing first and second fibres comprising first zones 23 extending the length of the fabric having a relatively high density and in which the first and second fibres are interlaced, the first zones being separated by second zones 29 of relatively low density in which the first fibres are substantially absent. The fabric may be formed by treating with fluid jets a layer of first fibres disposed on a layer of second fibres. Polyester polyolefine cotton and rayon fibres are specified. <IMAGE>