Pac boots like the Schnee's are better, in my opinion, because they lace up and provide better support. The Schnee's have a liner made of thinsulate and wool felt. Mine are very warm. he have a model that also has thinsulate molded into the rubber foot part of the boot. I have a pair of Muck boots that I like, a lot, but if there's a bunch of hiking in the day, it's the Schnee's hands down.