I bought a set a few years ago. They are bulky to wear, but they are really warm. They don't work very well with the cheap stands with small platforms, but I have pretty big feet. My feet tend to get cold even with heavy boots, but I can sit for hours in below zero temps with these on. If it's really cold I'll put a chemical warmer in on top of my boot. I can say without a doubt I can sit longer while wearing them.