I bought these boots to replace another popular name brand as they did not keep my feet warm. I should have just stayed with my Keens. These boots were warm and comfortable right from the start. They kept my feet warm and dry in -35°c last winter. The different ways to do up the boots is a nice change as well for me. Loved having the zipper, make for quick changes. Glad I found these...hope to never look back! Keen costumer service is fantastic as well. They stand behind their products which makes the buying power on line much easier to do.