Chiru or the Tibetan antelope (Pantholops hodgsoni) is medium-sized bovid, which is about 1.2 m in height. It's coat is grey to reddish brown, with a white underside. The Chiru’s wool, known as shahtoosh, is worm, soft and fine. Shahtoosh is very warmest, lightest and most expensive wool. The wool can only be obtained by killing the animal. It is listed as endangered by the world conservation union and the 'United States Fish and Wildlife Service' due to commercial poaching for its wool.