These kits and bundles use Blue Sky Fibers yarn.  Bundles include 21 mini hanks in 7 colors of Woolstok yarn (worsted weight).  The 21 color hat kit includes 21 mini hanks of Woolstock in 21 colors and a copy of the pattern.  Kit packaging is very nice and can be folded easily for shipping.  Woolstok yarn is made with 100% Highland Wool.  Each mini hank is approximately 12 yards