Thanks Annt,
For most of my charity quilts I use a 5oz polyester batt that I get by the roll from Marshall’s Dry Goods in AR. It is not densely put together, so even tho it is on the thin side, it poofs like that if you quilt minimally. You will notice I didn’t use any background filler stitching, just left the negative spaces open to puff up. The batting holds air so it’s warm but still lightweight. I love it.