The Leonberger is a calm, non-aggressive, large, muscular, working dog with a proud head carriage. He is distinguished by his balanced build, black mask, and double coat. Adult males, in particular, are powerful and strong and carry a lion-like mane on the neck and chest. A dog or bitch is easily discernable as such. For its size, the Leonberger is light on its feet and graceful in motion. Because natural appearance is essential to breed type, the Leonberger is to be shown with no trimming, sculpting or other alterations of the coat.
True to his original purpose as a family, farm and draft dog, today's Leonberger excels as a multi-purpose working dog; the most important task being a reliable family companion. The Leonberger is vigilant, obedient and quietly confident in all situations. He exudes good-natured watchfulness, depicting intelligence and vigor.