Mohair, of course!

Exodus 35:23, ARTB, mohair

Mohair is a wonderfully soft, beautiful hair from the Angora goat.  It is utilized in the ARTB for the Hebrew word TAHASH (Strong's number 8476) which occurs 14 times in the Old Testament.  These skins were utilized to wrap the very precious items for the tent sanctuary complex when it was moved from place to place.

http://www.ancientrootsbible.com/more-verse-for-the-day-mainmenu-84/13-blog-category/212-exodus-3523-artb-mohair.html

Bible Firsts, by Charles L. Paddock - Boing Boing

Now we what know what people looked like in the Bronze Age! It's obvious that he wove his outfit from his own hair, but what did she use to make hers? (Via Suddenly)

http://boingboing.net/2012/11/26/bible-firsts-by-charles-l-pa.html