Yak Down
Similar to cashmere, yak down fibers are a fine, soft protein fiber. They are just over an inch long and are combed or shed from the yaks that are a Tibetan plateau specialty. They are then de-haired for the yak down.
Its short staple length makes it a challenge to spin in its pure form; therefore, it is often blended with longer staple fiber such as wool, hemp and silk.