Fur plays a crucial role in an animal's coat. It consists of three layers: down hair, awn hair, and guard hair. Down hair, the undercoat, provides insulation as it consists of wavy or curly hairs. Awn hair fills the gap between down and guard hairs, starting off growing like guard hairs but becoming wavy and thinner. Guard hairs, also known as the topcoat, are longer, straighter, and coarser than the other hairs. They provide protection and color to the coat.