Mine are the Control Max model (rated -94�f) - and yes, they are comfy and really warm. Even sitting around in sub-zero, my feet don't get even a little cold. Only caveat would be that the soles are not made for scrambling over sharp rock and such. They are made to stay flexible in sub-zero temps. They are great for snow and ice, but I don't think they will hold up well to walking over hard pointy objects.