The angled topline offers a more comfortable fit around the calf while the extended rubber upper offers additional protection. This boot will be a classic for years to come. It features 5mm CR Flex-Foam and a breathable Airmesh Lining. The extended rubber coverage and angled topline enhance comfort and protection. The Achilles reinforcement and aggressive waffle high traction outsole provide stability and grip. CR Flex-Foam adjusts to the unique contours of your foot, creating 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: 2.0 cm.