Guard hairs are the longest, coarsest hairs in a mammal

Mammal

Mammals are members of a class of air-breathing vertebrate animals characterised by the possession of endothermy, hair, three middle ear bones, and mammary glands functional in mothers with young...

'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.

The coat

Coat (animal)

Coat, or the nature and quality of a show mammal's pelage, is important to the animal fancy in the judging of the animal, particularly at conformation dog shows, cat shows and horse shows...

 may be important in competitions, particularly at conformation dog shows

Conformation show

Conformation shows, also referred to as breed shows, are a kind of dog show in which a judge familiar with a specific dog breed evaluates individual purebred dogs for how well the dogs conform to the established breed type for their breed, as described in a breed's individual breed standard.A...

, cat show

Cat show

A cat show is a judged event where the owners of cats compete to win titles in various cat registering organizations by entering their cats to be judged after a breed standard. Both pedigreed and companion cats are admissible, although the rules differ from organization to organization...

s and horse show

Horse show

A Horse show is a judged exhibition of horses and ponies. Many different horse breeds and equestrian disciplines hold competitions worldwide, from local to the international levels. Most horse shows run from one to three days, sometimes longer for major, all-breed events or national and...

s.

Marine mammals

Pinniped

Pinniped

Pinnipeds or fin-footed mammals are a widely distributed and diverse group of semiaquatic marine mammals comprising the families Odobenidae , Otariidae , and Phocidae .-Overview: Pinnipeds are typically sleek-bodied and barrel-shaped...

s and Polar Bear

Polar Bear

The polar bear is a bear native largely within the Arctic Circle encompassing the Arctic Ocean, its surrounding seas and surrounding land masses. It is the world's largest land carnivore and also the largest bear, together with the omnivorous Kodiak Bear, which is approximately the same size...

s have longer guard hairs forming the most visible fur

Fur

Fur is a synonym for hair, used more in reference to non-human animals, usually mammals; particularly those with extensives body hair coverage. The term is sometimes used to refer to the body hair of an animal as a complete coat, also known as the "pelage". Fur is also used to refer to animal...

; polar bears' guard hairs are hollow.

See also

• Awn hair
  Awn hair
  Awn hairs are the intermediate hairs in a mammal's coat. They are shorter than the guard hairs and longer than the down hairs. They help with insulation and protect the down hairs underneath. Most of the visible coat is made of this kind of hair....
  
  
• Coat (animal)
  Coat (animal)
  Coat, or the nature and quality of a show mammal's pelage, is important to the animal fancy in the judging of the animal, particularly at conformation dog shows, cat shows and horse shows...
  
   for a general discussion of coats
• Coat (dog)
  Coat (dog)
  The coat of the domestic dog refers to the hair that covers its body. A dog's coat may be a double coat, made up of a soft undercoat and a coarser topcoat, or a single coat, which lacks an undercoat...
  
   for details about dog coats
• Down hair
  Down hair
  Down hairs, also called the ground hairs, are the very fine, fluffy hairs closest to the skin on some mammals. The hairs are short and crimped, which makes them highly efficient for trapping air and insulating the animal....