I just got Bonnie Hunter's book Scraps & Shirtails from the library today. Her site is Quiltville. She has a couple of pages in the front of the book on batting. She gives a positive recommendation for Nature-Fil by Fairfield that is 50% bamboo and 50% organic cotton. Here's what she says,"...breathable, very soft drape, can be quilted up to 8-inch intervals, is ideal for machine quilting, and is naturally antibacterial." I didn't know Joann's was going to do that, and I don't know what kind they will carry, but it could be a good thing.