100% yak down.

From the Shokay website:
Shokay yarn is made of luxurious pure yak down fiber, hand-combed from the yaks in the exotic Himalayan regions. The down is spun into a Worsted-weight yarn, bringing you the same warmth that protects the yaks at sub-zero temperatures. This unique hand-knitting yarn is amazingly soft to the touch and comes in a variety of beautiful colors. Shokay yarn is perfect for one-of-kind projects and gifts and is also machine washable.

For inspirations on what other people have knitted with our yarns:

http://www.ravelry.com/yarns/library/shokay-shambala-yak/…

http://www.flickr.com/search/?q=shokay

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