A new sole and an improved last give this popular, updated Muck shoe more stability on wet surfaces along with an even greater level of comfort and fit. The Muckster II Low is the perfect shoe when its wet and muddy. Features include a 4mm CR flex-foam, breathable Airmesh lining, and a comfort topline with a pull-on tab. The new technical, high traction rubber outsole provides stability and comfort. The CR Flex-Foam adjusts to the unique contours of your foot to create a comfortable and stable foundation while resisting blisters and chafing. Upper: Rubber/Neoprene; Lining: Breathable Airmesh; Sole: Rubber. Care Instructions: Clean with cold water and use rubber boot care. Heel Height: 2.5 cm.