Keen Men's Revel 4 Mid-Polar BootThe agility of a light hiker with the warmth of a down jacket. Keen built these mens winter boots with active, frigid days in mind. With 200 g of insulation, heat trapping materials underfoot, and exceptional grip on snow and ice. Non marking multi directional lugs for increased traction 5 mm multi directional lugs for traction Stability shank delivers lightweight support Keen. Warm Recycled PET insulation rated to 32 C Keen. Dry waterproof,