I just did the iron test and while the one I think is wool just flattened, the other became quite stiff but it didn't melt. When I did burn the poly, I didn't get any dripping blobs but there didn't seem to be any residue. I am quite sure now which is which but I might take a sample of each to my favourite local quilt store and ask them if they can tell. I will never "unlabel" batting again.

Just a thought, if it is that difficult to tell the difference by the hand of it, would it make that much difference in the quilt itself. I know you "want" to use the wool, and I know it would be the "better" batting, but maybe just use either one and move to the next quilt to use the other!

I learned something new today. I will use this on my stash of leftover batting to sort. Thanks everyone!

No need for a burn test. Hobbs poly down is white. Quilters Dream wool is a cream color.

Thanks, feline fanatic. You have further confirmed what I thought. I think I now know which is which. On to sandwiching. Many thanks to all.

That ended up "being easy"! :)

I learned my lesson to label everything when I had some interfacings and stabilizers all mixed up. I use a scrap of fabric and write the product line and name of product and use a safety pin to attach it. Now whenever I need to use the batting, stabilizer, etc., I unpin it and immediately re-pin it after I cut it. Took a while to train myself but worth it.

I always staple a piece of the batting washing instructions and identifying info on one edge of the roll since I ALWAYS forget!

Take a Small night of each. Natural fibers will melt in your mouth, poly will feel wirey. Works with all fabric just need a tiny bit.

Burning wool smells like burnt hair (ever caught a strand of hair in your blow dryer?); and yes, the poly will melt, but also has a chemical odor.