Going to AK wrote a review of Sorel Glacier Boot - Women's on May 9, 2012
After researching many boots and trying on a few different pairs, I ultimately chose these boots. They ended up keeping me warm in -20F weather while I stood outside for a couple hours. The only time I felt the cold was during a long dog sledding trip in the early morning and as long as I kept my toes moving, they pretty much kept warm enough. But I opted to go with smaller boots when snowshoeing because I felt these would be too clunky, heavy, and probably too warm for strenuous activity.