Soft Fuse is the one I use too. I bought a three yard roll. It comes in 18" width and 36" widths. I buy it from the Soft Fuse website. It's more economical compared to the other thin soft fusibles.
Can anyone compare Misty Fuse with Soft Fuse? I use Misty Fuse and it stays soft too. Just wondering if Soft Fuse is sufficiently different for me to try.