Walk right through winter wonderlands in KEEN® Revel III Hiking Boots. 2 types of insulation combine for ultimate warmth. First, Keen.WARM provides lightweight warmth that won't slow you down. Plus, TRAPOLATOR multi-layer warmth works where you really want it: underfoot. In fact, it's 3 layers of heat-trapping material between you and the frozen tundra. Speaking of frozen, the outsole is designed for traction on winter terrain, even slick surfaces. And of course, there's KEEN.Dry breathable waterproofing for dry wear. So when the weather is frightful, you'll feel delightful.