Their thick undercoat, and long white overcoat, protects them from blustery wind, and harsh weather that often occurs in their mountainous habitat. Both male and female have short, strong, legs that have large black hooves on the end. The billy had long slender horns that measure approximately 1 foot. The nannies have slightly longer horns. The female uses her horns to defend her young. She will often dominate the territory, and the male will leave her alone.