Beavers were trapped for their fur nearly to extinction. It was horrible and sad, but to be totally honest they do have incredibly thick, luscious fur so I can see why trappers targeted them to make warm winter hats and coats.
The average human has between 1000 and 2000 hairs per square inch on our heads.
Beavers have on average 77,000 hairs per square inch, composed of an underlayer of warm downy hairs, and a longer layer of slick, water-resistant hairs. The combination of these two layers is a very warm, totally waterproof fur coat all over the beaver’s body. Sounds cozy.