Whether you're preparing for another cold and wet winter in the Pacific Northwest or are in need a solid boot to get you around during blizzard season in the Midwest, the Keen Revel III Boot has your feet covered. The Keen. Dry membrane seals out rain and snow while helping water vapor escape quickly, so sweat and condensation won't have time to build up. The Heat Trapulator footbed layers three separate heat-trapping layers, including 200g Keen. Warm insulation, to hold warmth close to your foot and fight back against below freezing temperatures. The pliable nubuck leather upper bolsters weather protection while letting your feet move about freely.