In short: I LOVE IT! It’s a firm, yet flexible sew-in dense interfacing. It is NOT a fusible interfacing. It’s similar to Peltex or Timtex, Stiff Stuff but is softer and I feel it’s easier to work with.
Stiff Stuff performs beautifully in all my bag, wallet, wall hanging and place mat projects and I’ve never been disappointed when I use Stiff Stuff.
That said… The dreaded thing has happened that almost always seems to happen at some point or other whenever I find a product I absolutely love. It’s out-of-stock — even with the manufacturer and our suppliers. We’ve been told by the manufacturer that it’s expected to begin shipping again in mid to late October this year (2017).
Until Stiff Stuff is back in stock, I highly recommend substituting Soft & Stable for patterns that call for Stiff Stuff. Soft & Stable is also very easy to work with and holds a beautiful shape. Give it a try, I bet you’ll love it too.