Must be double - coated with profuse harsh outer coat and short, soft, close furry undercoat. (cairnrescue.com)
It has a long straight harsh outer coat standing off from its body, a good mane and a thick downy undercoat — all imparting superb insulation from cold and damp. (modernpuppies.com)
A short, tight, wiry, harsh outer coat protects them from twigs and burrs. (breeders.net)