This wool fiber comes from the alpaca, a member of the South American camelids. It's typically known for being soft, warm and lightweight, but very strong. It's also hype-allergenic: most people who are sensitive to wool have no problems wearing alpaca.
This fiber comes from the cashmere goat: fine in texture, but strong, light and warm. Cashmere is commonly known for its ultra-soft quality.
A wool fiber obtained from the long-haired bovine from the Himalayan region, surviving at altitudes sometimes exceeding five thousands meters. Yak wool is very warm and incredibly soft, but at the same time it's light and very well insulating.