Women's Revel IV Mid Polar Boot | KeenThe agility of a light hiker with the warmth of a puffy coat. We built these winter boots for women with active, frigid days in mind. With 200g of insulation, heat trapping materials underfoot, and exceptional grip on snow and 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