Vicuña

The vicuña (Vicugna vicugna) or vicugna is one of two wild South American camelids, along with the guanaco, which live in the high alpine areas of the Andes. It is a relative of the llama, and is now believed to share a wild ancestor with domesticated alpacas, which are raised for their fibre. Vicuñas produce small amounts of extremely fine wool, which is very expensive because the animal can only be shorn every 3 years. When knitted together, the product of the vicuña's fur is very soft and warm. It is understood that the Inca valued vicuñas for their wool, and that it was against the law for any but royalty to wear vicuña garments.

http://en.wikipedia.org/wiki/Vicuna