expensive Kashmir is not the origin of carpet weaving the art come from Persia. These carpets are famous for two things- they are hand made and they are always knotted, never tufted , the more knots per square inch, the greater its value and durability. Also there are single and double-knotted carpets. A single knotted carpet is fluffier and more resistant to touch than the double knotted. Knotting of the carpet & yarn is the most important features. The yarn used normally is silk, wool or silk and wool. Woolen carpets always have a cotton base.