I've had these for months now. I've worn them outside to just walk to the car and back and used them for the first time yesterday for the majority of the day. I went ice fishing and the temps were double digits - not that cold. But after about 45 minutes my toes were frozen. I was wiggling them around in the boot to get them warm. I wasn't standing in one spot on the ice either, I was moving around. I would have stayed in one spot but my toes were hurting. I had to move around to get them to warm up.

I have my correct size, I was wearing wool socks. My toes were frozen.

It didn't make the trip a miserable one but with the degree they claim to be rated, my toes should have been warm - especially since I had on good socks and there's an insert in the boot to keep you warm, too.

Also, it feels like the heel is maybe made funny/different. They're awkward to walk in.