Yak fiber is the term commonly used to refer yak fiber wool produced from the coat hair of yaks (Bos grunniens), a long-haired bovine mainly found in the Himalayan region, Tibetan plateau, and some areas of Mongolia and Central Asia.
Yak fiber wool has been used by nomads in the Trans-Himalayan region for over a thousand years to make clothing, tents, ropes and blankets.