The Kurdish town of Bijar in the province of Kermanshah has gained international reputation for the high quality of its carpets. The characteristic weft technique used in the Bijar area has led to the term Bijar sturcture to describe the use of a single weft shoot, thick and tautly streched after every row of knots.The strong tension of the weft pulls the warps into two layers, giving the carpet rigidity, although if handled carelessly or folded, it will crack and tear. Carpets with a Bijar structure must therefore be rolled for transport.