Stupid question time: Is fleece cheaper than a decent cotton batting? Although, I suppose that's one of those YMMV questions, huh? Depending on where you get it, whether you can find remnant/clearance pieces-parts, or the weight/thickness you purchase.
Warm & Natural is on sale/clearance at Joann's this week for 50% off...$22.xx for queen size. But I don't know how that compares to fleece yardage.