I climbed Mt. Washington on January 2nd with these pants and a insulating baselayer. They did excellent. It was -20 FH ambient, and -60 with the windchill. 75mph windgust, I didn't feel a thing! They are well manufactured and feel extremely sturdy. They are not ment for people trying to cut back on weight or skimp on warmth, they are warm! If you get too warm just unzip the vents. The built in gaitors work great and I ended up not using the gaitors I brought along. Not too many pockets, but I have no complaint with that.