Body: People who study "Furs" investigate Fur is a thick growth of hair that covers the skin of many animals. It is a defining characteristic of mammals.
Leopold von Sacher-Masoch, Robert Michael Ballantyne are some authorities of "Furs".
It consists of a combination of oily guard hair on top and thick underfur beneath. The guard hair keeps moisture and the underfur acts as an insulating blanket that keeps the animal warm is some of the cause to investigate "Furs".
Down hair, Awn hair, Guard hair are a few categories of "Furs".