The coat is wiry, close-lying, strong, and dense, 0.75 to 1.25 in (1.9 to 3.2 cm) long with a dense, water-repellent undercoat. The outline of the body is not to be hidden by the longer coat. Pronounced eyebrows along with a strong, harsh beard, 0.75 to 1.25 in (1.9 to 3.2 cm) long on both sides of the muzzle reinforce the determined expression. The coat should never be long, soft, silky, shaggy, crinkle, wooly, thin, lacking undercoat or lacking brushes on the legs.