Seems to be of high quality, but I strongly doubt the proportion of wool. I have Rothco Military Wool socks that are 60% wool and my feet never get cold in them. I've used them this season and so far my feet have gotten cold pretty quickly in work boots. They are soft, moderately warm and sit well on the leg, but in deep snow, unrivaled, after 10 minutes the legs begin to freeze. Half an hour later I'm looking for warmth. My Rothcos, I can stand in a snowdrift for a few hours.