Muck Boots MB Derwent II High BootsQuality, functionality and comfort in one product. These mid height boots are perfect for muddy wet conditions. The upper is reinforced in both the toe and ankle area, plus a rubber outsole with aggressive tread pattern helps grip. 4mm CR Flex foam PK Mesh Lining Comfort topline Reinforced toe and ankle Rubber outsole with aggressive tread pattern Temp rating 0C to 18C CR Flex Foam adjusts to the unique contours of your foot to create a comfortable