This stuff really works. These navy-blue suede leather boots were too cute to pass up even though the boots were painfully snug. So I ordered this spray, and it arrived this afternoon. First, I put on some thick socks. Then I liberally sprayed on the outside of the boots the areas I wanted to stretch (the entire upper except for the ankles). I also liberally sprayed the inside of the boots (again, except for the ankles) even though the inside has a synthetic fabric lining bonded to the leather. Immediately I squeezed my feet into the boots, zipped them up, and began walking around the house, reading a book to pass the time. It was uncomfortable at first. After an hour, I noticed that the boots felt looser and I could even wiggle my toes inside, as I could not possibly do before. Now it has been about two hours, the boots are pretty much dry, and my feet feel comfortable in the boots, even with the thicker sock on. These boots will be perfect with the thinner socks I usually wear. The parts of the suede leather I sprayed directly do not look any different from the parts I did not spray. (Please see attached photo.) By the way, some people say this stuff is just alcohol and water, but judging by the smell  reminde me faintly of nail-polish remover but not nearly as intolerable  I do not think it is just alcohol I am smelling. I highly recommend this stuff! There is even a money-back guarantee by the manufacturer, which was a big factor in my choosing this brand over others. I am about to go treat a pair of open-toe mules where the toe opening tends to squeeze at my toenail.