Muck Boots Wetland Rubber Premium Women's Field Boot Rubber Imported 5 mm neoprene provides comfort and flexibility, along with excellent waterproofing, shock absorption and heat retention properties; adjusts to the shape of your feet to resist blisters and chafing Stretch-fit Comfort Topline snugs calf to seal in warmth while keeping cold and debris out Breathable Airmesh lining wicks away humidity and perspiration, and allows air to travel throughout the boot while keeping water out; comfort rated from -20 F to 50 F (-30 C to 10 C) Lightweight EVA midsole for additional cushioning High-grade rubber exterior provides extra toughness and makes for a 100% waterproof hunting boot; MS-2 bobbed molded outsole reduces weight and improves stability for climbing and trekking