In mammals, pelage is the hair, fur, or wool that covers the animal. In many mammals, the pelage is made up of more than one type of hair. Some of the most prominent types of hair that make up the pelage include guard hairs (such as the defensive spines of porcupines), bristles (which make up the mane of lions), and the underfur, which traps in air to maintain temperature. The pelage often molts (process that sheds hair) at various times in the animal's development. The juvenile pelage may go t… (More on Pelage)