I have one pair , for all applications. Danner pronghorns. I wear them almost every day of the year.they generally last a year, two at most. but they get worn. I believe they are 800 gr and are waterproof. I KNOW MANY SAT INSULATED BOOTS MAKE THEIR FEET SWEAT, I guess I am lucky to have never had that problem. I find that so long as my boots are a little loose my feet stay warm if they fit tight, they do not