Leno bag (also called gauze weave or cross weave) is a weave in which two warp yarns are twisted around the weft yarns to provide a strong yet sheer fabric. The standard warp yarn is paired with a skeleton or 'soup' yarn; these twisted warp yarns grip tightly to the weft which causes the durability of the fabric. Leno weave produces an open fabric with almost no yarn slippage or misplacement of threads.

Leno bag fabric, which allows light and air to pass through freely, is used in any area where a sheer, open weave fabric that will not bruise (where the threads shift away from their original positions, disturbing the uniformity of the weave) is required.