Thanks for the link. I hadn't saw those before. I dont think that design is really for me though. I dont really like the idea of my boots going down inside them and dragging whatever mud or rocks or whatever is on them into the waders. From the sound of it, they count on the boot inside for support (they seem to have just enough sole to protect the material), and for proper fit, so it doesn't sound like they would work without the boot inside. Also, I would rather my boots not get wet if they did spring a leak. I hate wet shoes worse than just about anything. If my idea with the heat sealable fabric doesn't work out, I may come back to those though.