What I meant with using "heavy" I meant the opposite of down comforters/duvets. I have a down comforter on my bed and yes it keeps me warm but it is very light. I like the feel of a "heavy" blanket. I know heavy and hand quilting does not really go together which is why I'm asking the wise quilting experts on this board ;)

i suggest you go to a store that sells batting. Take along a needle and test a few to find the one what works best for you.

I have used high loft batting. I use slightly larger stitches but like the "trapunto" look you get from it. You might have to adjust your needle size a little.

So I ordered 2 rolls of Hobb's 80/20 batting - now I cant decide if I want to use one layer or two!