It is a medium-sized animal (between 55cm and 65cm) and very muscular. It has a "chunky" look but still elegant in his movements. His hair is medium and hard. They are often gray with reflection (black, blue, fawn, ...). This is an intelligent and lively animal, but wary when it comes to foreigners. This is an excellent working dog, hard working and able to lift heavy loads (it was at the base, used for smuggling between France and Belgium!). But it is also a loving animal that loves company, plus it is almost indefatigable do not hesitate to make long walks with him or go jogging!