Features of the KEEN Women's Terradora II WP Ankle Pull-On Boot Recycled Pet plastic Upper Fleece lining for warmth Thermal heat shield insole captures warmth Low-Density EVA Midsole caters to a woman's foot Keen. freeze rubber Outsole for traction in cold conditions Non-marking rubber Outsole leaves no trace Stability shank delivers lightweight support Keen.dry waterproof, breathable membrane Keen.warm Insulation rated to -25AdegF/-32AdegC Eco anti-odor for natural odor control Recycled Pet plastic PFC-free, durable water repellent Slip-on design for easy on and go