Sarouk is a small province north of Sultanabad in west Persia. Ferehans were woven in the village of Sarouk but carpets given the name Ferahan are of a distinct and exceptional type. These rugs were made over a period of one hundred years beginning in the mid 18th century. They have an asymmetrical knot on a cotton ground; the wefts are dyed blue or occasionally pinkish red. The weave is extremely fine and the many patterns combine both tribal and more traditional designs.They often have a floral border with a soft pale apple or pistachio green ground.