Bidjar is the name of a small Kurdish town in western Iran. Kurdish rugs are often very strong and compact, which makes them extremely durable. They can be successfully used in public or highly trafficked areas because they are almost indestructible. In fact, they are often called the iron rugs of Persia.
The weavers use a heavy comb, made of metal and wood, to beat the weft and the knots, so that the pile almost stands up. The surface of the pile therefore, becomes very compact, which prevents gravel and other small particles from being pressed into the rug.
Bidjar rugs are made with Turkish knots and are generally red and blue with beige elements. They also incorporate the Herati motif, which is explained in the video.