The hair, fur, wool, or other soft covering of a mammal is called pelage.

pelt or pelage.

I believe it is 'Pelage'.

Or hair.

The scientific term for animal fur is "pelage." This refers to the coat of animal hair, which can vary greatly in color, texture, and thickness depending on the species. Pelage serves various functions for animals, such as insulation, camouflage, and communication.

For insulation. There is another function (which is sorta my class assignment to find out).. let me know if you find it though. :)