The Leonberger has a full, water resistant, double coat. The long outer coat is durable, relatively straight, lies flat, and fits close. Mature, male Leonbergers have a pronounced mane on its neck and chest, creating a lion-like outline. It has generous feathering on its legs and tail. Its undercoat is soft and dense With its black mask a range of coat colors from sand,yellow, red, brown are found, maybe tipped with black.

All this amount of coat requires constant attention to prevent knots.