Thanks Lori. It's not iron on. I will try to iron a bit of it. If it comes out ok, then I may as well store it all folded up and iron it as needed. I don't use interfacing (yet...) but I know enough not to discard something that may come in handy someday.
Regarding the craft vs garment interfacing. I guess if I use the craft one in a garment, I may have unwanted shrinkage when I wash my garment. Perhaps I should take a scrap of this and create a small item and then wash it to see what happens. Thanks for that bit of useful information.