Featuring the most advanced Vibram outsole technology to date, Muck Arctic Ice Series Extreme Conditions Men's Winter Hunting Boots are specifically engineered to deliver grip and performance on wet ice. The Arctic Grip Outsole pods offer the most advanced traction in wet ice environments, and the multi-direction lug design provides sure footing on multi-surface terrain. The outsole of these men's winter boots also features the Vibram Icetrek full base layer for unparalleled traction on dry ice. From a comfort perspective, the heavy-duty 8 mm CR Flex-Foam is flexible, 100% waterproof, and possesses excellent heat-retention properties. The fleece lining and 2 mm of thermal foam under the footbed ensure exceptional warmth and deliver a comfort rating of -60 F to 30 F (-50 C to -1 C). An extended rubber shaft rounds out the cold weather coverage of these waterproof winter boots.