(from the article `mammal`) Most mammals have three distinct kinds of hairs. Guard hairs protect the rest of the pelage from abrasion and frequently from moisture, and they ... The pelts of fur-bearing animals are called true furs when they consist of two elements: a dense undercoat, called ground hair, and longer hairs, ... ...are c... Found on http://www.britannica.com/eb/a-z/g/77