Trend Muck Boots Men's Wetland Mid Boot - Brown/Mossy Oak Country DNA100% Waterproof 5mm CR Flex Foam neoprene liner is 100% waterproof with exceptional comfort, flexibility, shock absorption and heat retention properties; adjusts to the contours of your foot to resist blisters and chafing 2mm thermal foam under the footbed for extra warmth Breathable mesh lining wicks away humidity and perspiration, allowing air to travel throughout the boot Extended rubber overlay for extra protection Stretch fit comfort topline