The upright pile of Turkish rugs usually falls in one direction, as knots are always pulled down before the string of pile yarn is cut off and work resumes on the next knot, piling row after row of knots on top of each other. When touching a carpet, this creates a feeling similar to stroking an animal's fur. This can be used to determine where the weaver has started knotting the pile. The pile in Turkish carpets is usually between 2 and 4 mm thick. Coarse nomadic rugs like the Yürük rugs, can be as thick as 12 mm. A special bedding carpet called "yatak" may reach a pile thickness of 20 to 25 mm.