Giant Suspension Boots!.

First you've got a fleece lined boot - something like a ski boot liner, but designed for comfort. This is inside of a giant rubber boot - designed to look like a rubber rain boot. The inside boot connects to the outside boot by a lot of springs, elastic bands and perhaps some kind of suspenders if they happen to be necessary. So basically they're just moon boots, but they're comfortable and look awesomely ridiculous instead of just regular moon boot ridiculous.