Thanks Ladies! I did a melt test and it went up in flames, no melting at all, and for whatever it's worth, it (the burning batting) had a very natural smell, if that makes sense! :lol: So I'm feeling pretty confident that it is indeed cotton.
I've decided to do double sided oven mitts and pot holders, with different coloured, but co-ordinating fabrics on the front and back of the mitt/holder. So far, I have one side for each mitt basted, hopefully I'll finish them tomorrow for use this weekend! (It's Thanksgiving weekend in Canada, my hubby and I are hosting this year). I'll take pics when I'm done!