Rude Boywrote a review of Western Mountaineering Flash Down Bootie - Men's on May 17, 2015
These are great! I bought them for hanging around camp and sleeping in while ski mountaineering. I am a cold sleeper to begin with and even in a 0 degree bag my feet will get cold. Not any more :) These are comfy to wear and especially sleep in. Your foot does slide around in them a little while walking around but I do not move around too much in them anyway while I have them on. They are super lightweight and not noticeable when stuffed in the bottom of my pack. The only thing is they are made in the large side. I am a straight up men's 10 shoe size and the medium fits me well. There is even about an extra inch or so of space. If I had gotten the large they definitely would have been way too big.