Hours of warm, dry feet on the coldest days. With a higher profile for deeper powder and our warmest insulation (rated to -40°F), plus better grip on ice. Features KEEN.DRY waterproof, breathable membrane KEEN.Polar Traction outsole for more grip on snow and ice 5mm multi-directional lugs for traction Heat Trapolator technology: Three layers of heat-trapping materials underfoot 400g of KEEN.WARM Recycled PET insulation rated to -40°F/-40°C Stability shank delivers lightweight support High-abrasion rubber tip for added durability and protection Environmentally preferred premium leather from LWG-certified tannery Eco Anti-Odor for natural odor control Original Fit–Iconic KEEN fit with generous space across forefoot for toes to spread out KEEN Women’s Revel IV High Polar Waterproof Boot