What is the name of the dense, insulating undercoat found on the Musk Ox (*Ovibos moschatus*)?

Answer

Qiviut.

The Musk Ox possesses an extremely thick, shaggy coat comprised of two layers: long, dark guard hairs and a dense, insulating undercoat known as qiviut.

What is the name of the dense, insulating undercoat found on the Musk Ox (*Ovibos moschatus*)?
animalbodyphysicaltraitboi