givio, try a wool batt made by Quilter's Dream, it's what I use. (I know this wasn't your problem, but a good general rule: Always make sure your needle is sharp when you do the quilting, with any kind of batt.)

JustAbitCrazy, Thanks for the tip! I figured that, or Hobbs next. :-)

I have used Quilter's Dream wool batting in two quilts. The top and back of the first quilt was made with quilting cotton and there is some bearding overall through the cotton after washing. The top and back of the second quilt was made with Liberty of London Tana Lawn cotton which is a much tighter weave than quilting cotton and there is no bearding on the Liberty quilt. The wool batting is so luxurious that I am going to try it in the quilt I am currently working on which is both quilting cotton and Liberty of London Tana Lawn cotton.

I love wool batting. My summer quilt has a wool batting. It is wonderful to work with, lightweight yet lofty and breaths. Cool in summer, warm in winter. Showcases quilting beautifully. I’ve not tried the silk batting but I would guess it too would be wonderful to work with and have all the benefits of a natural fiber.

I am leery of wool batting now because it bearded through the fabric of the quilt top, and that quilt will now have an itchy feel. I will put a hanging sleeve on it and suggest it be hung. This happened only with the darker fabrics; it was Quilter's Dream wool. I plan to try Hobb's wool batting, but not with dark colors.

The only silk batting I know of is Hobb's Tuscany silk, which does have a small amount of poly. This batting does drape beautifully, but as mentioned above, there isn't much definition with the quilting.

I'm a big fan of the Hobb's wool/cotton batting (I believe it is 20% wool, 80% cotton). It is wonderfully cushy and soft.