Thanks everyone! I think I'll use that old fleece for batting (assuming it's big enough! I haven't even measured it yet, so I might be ahead of myself here...lol), but leave out a fleece back. I'm worried about my basic machine working well with a double layer and I don't want it to be too hot, either.
Originally Posted by gollytwo
Use the fleece as batt and a fabric or muslin as the back.
Sheets are very hard to needle if you're planning to hand quilt. They're great for machine quilting though and a lot cheaper than quilt fabric
The sheet as backing is a great idea. Better price and no worries about it not being big enough or having to cut and piece it together to fit it. Thanks!