Tibetan sheep produce a thick fleece which is rich in lanolin. The quality of unprocessed wool is assessed in terms of its staple strength and the length of the fibres. (Staple is the name given to a bunch of the wool fibres.) Wool from Tibetan highland sheep has long fibres and a high staple strength. These hardy animals are reared at an altitude of up to 17,000 feet above sea level.
The high lanolin content gives a silky sheen and keeps the wool soft and supple, it also acts as an anti-staining agent.
Rugs made of this wool mellow beautifully and last for generations.