The product features a waterproof leather and performance mesh upper, designed for comfort and warmth with KEEN.WARM Recycled P.E.T. insulation rated to -25F/-32C. It includes Heat Trapolator technology and a KEEN. POLAR TRACTION outsole for improved grip on snow and ice. Gently brush leather with a soft bristle or hand towel to remove loose dirt and debris. Tough stains may require a leather cleaner.