Do you like to make bags? Or really any 3D sewing object. Then Soft & Stable from Annies should be your go to interfacing. I often substitute it even when it is not the called for interfacing. It is…wait for it…both soft and stable.
As you can see, it is about 1/8″ thick, but it can easily squish. You DO NOT need to cut it away from the seams which is both time saving and leads to stronger bags. I’ve heard some folks complain about the price, but it’s worth every penny! By the time you’ve purchased the multiple other types of interfacing that would be needed to equal the stability of this, you’d have spent more and created an inferior product. I use it in my All Sewn Up Sewing Kit! Try some out; you’ll never look back.