What is the body of a walrus covered in?

The body of a walrus is covered in thick, tough skin that is almost hairless, except for a few bristles around the mouth. This skin is up to 4 centimeters (1.6 inches) thick, and it is made up of a layer of fat that helps to keep the walrus warm. The skin is also covered in a layer of mucus that helps to keep it moist and protected from the cold.