The Coats of domestic dogs are of two versions: "double" getting frequent in dogs (as well as wolves) originating from colder climates, created up of the coarse guard hair as well as a tender down hair, or "single", Together with the topcoat only. Breeds might have an occasional "blaze", https://jaidenmzjzg.glifeblog.com/30973676/the-ultimate-guide-to-dogs