Guard hairs are the longest, most coarse hairs in a mammal's coat, forming the topcoat (or outer coat). They taper to a point and protect the undercoat from the elements. They are often water repellent and stick out above the rest of the coat. Guard hairs add the sheen to the coat of an animal.

In the hobby of animal fancy, the coat is an important conformation point in shows, particularly dog, cat and horse shows.

See also

• Awn hair
• Coat (animal) for a general discussion of coats
• Coat (dog) for details about dog coats
• Down hair
• Fur