IWS have several distinguishing characteristics which place them among the more recognizable of all breeds: The topknot of long, loose curls growing down from the head which often covers the eyes; a "beard" growing at the back of the throat often accompanied by "sideburns"; and a curled, liver ("puce")-coloured coat. The most distinguishing characteristic of these dogs is the smooth "rat tail", completely free of long coat except at the base where it is covered for 2–3 inches with curls. The face is entirely smooth-coated and, unlike the poodle, should require little or no trimming to stay that way. An IWS is ruggedly built with webbed feet to aid in its powerful swimming. Altogether, the IWS presents a picture of a smart, upstanding, strongly built but not leggy dog, combining great intelligence and rugged endurance with a bold, dashing eagerness of temperament.