The use of wool and its weaving is restricted dominantly to those regions which have a cold climate. Wool obtained from sheep is commonly used. The raw wool from the sheep has to go through several processes before it is ready to be used as yarn for weaving. The fleece is first sorted by hand and the fine wool separated from the coarse. Fibers of similar length are put together. The wool is then washed in soapy water to remove impurities like straw, thorns, and burrs which tend to bury themselves in the animal’s coat. Once clear of impurities, the wool is pulled apart to separate and loosen the entangled fibres. Traditionally this teasing is carried out with two wooden combs: a lock of wool is placed on one comb and the entanglements are straightened by placing another comb on top and drawing the wool fibres between the two. The untwined wool is ready to be spun into yarn using a spindle.