My guess is that you are wanting the best of 2 worlds but I don't know they will work together. The crinkle comes from shrinkage, which cotton batting will do, but the polyester (puff) will not. I'd have concern that the 2 won't play well together. Good idea to make the 2 mats and see how it works before delving into a big quilt using this idea. Myself, I like a puffy quilt so always go with polyester. It stays soft unlike cotton.
Have you considered a poly batt with flannel or fleece backing?
Last edited by illinois; 10-30-2016 at 04:58 AM.
Reason: 2nd thought