Just wondering .... is the store mis-naming it?
The fleece that I have seen is an iron on fusible, called for when making purses/bags.
While it is probably technically called interfacing, to me it has more of a batting quality to it.
Check it out and see what you think about it.
If hesitant, buy a small quantity, rush home to try it .....
Then if you like it ...... run back before the sale is over, and stockpile!
All of the Pellons have their product name/# on the bolts, so you could check on that with the store, and read up about it online.
Here's a link to where your store has likely purchased it.
It'll take some time to go through it all, but you might find the info that you need/want.
https://www.quiltsourcecanada.ca/man...imit/40/page/1