The
mane is the hair that grows from the top of the neck of a
horse or other
equine, reaching from the
poll to the
withers, and includes the
forelock or foretop. It is thicker and coarser than the rest of the horse's coat, and naturally grows to roughly cover the neck.
Heredity plays a role, giving some horses a longer, thicker mane, and others a shorter, thinner one.