wool quilts are lovely. It depends on the type and weight of wool you use for the quilt. In the olden days when there was not so much poly fabrics out there I used to get wool plaid pleated skirts, it was light weight, and make quilts from them. Now I can't find them so I think you will have to go to a fabric store and look at what is on offer. It will give you a chance to see what the different weights are and if the blends work for you. The advantage of using a blend is that there is lots less shrinkage. Remember if you use 100% wool and you wash it, it will felt up a lot. If you find a wool you like, then buy a half yard, wash and dry it several times...wool with shrink more than once. Otherwise be prepared to have your quilt dry cleaned. If you use wool, even with a cotton backing you will probably not need much of a batt if any at all. think of it as a real exploration of a wonderful fiber.