The Keen Men’s Revel IV Polar Boot features the agility of a light hiker with the warmth of a down jacket. With 200g of insulation, heat-trapping materials underfoot, and exceptional grip on snow and ice.KEEN.DRY KEEN.WARM KEEN.POLAR TRACTIONWEIGHT 24.27oz / 688gFEATURESKEEN.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 200g of KEEN.WARM Recycled PET insulation rated to -25°F/-32°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 outMATERIALSWaterproof leather and performance mesh upper Metal eyelets for added durability Breathable textile lining Thermal Heat Shield insole captures warmth Non-marking multi-directional lugs for increased tractionCAREGently brush leather with a soft bristle brush or hand towel to remove loose dirt and debris. Tough stains may require a leather cleaner. Keen Men’s Revel IV Polar Boot Dark Earth/Caramel