I'm actually kicking around the idea of making a set of these. I think it would be simple enough, just use some soft felt or fleece and put a zipper up the front for easy on/off.
I used them on my successful Jan 2019 AZ Archery Hunt. They are good for places like AZ that have lots of Sharp bushes and thorns because you can keep your boots on and your feet protected. Depending on the Unit and State, I go between the Safari Sneakers and an extra thick pair of wool socks.