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. 4mm CR flex-foam. Breathable, Airmesh lining. Comfort Topline. Pull-On Tab. New Technical, High Traction, Rubber Outsole. Temp rating 0C to 18C. CR Flex-Foam adjusts to the unique contours of your foot to create a comfortable and stable foundation while resisting blisters and chafing. Ref: UTFS4385