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 for a comfortable and stable foundation, a breathable Airmesh lining, and extended rubber coverage. The boot has an angled topline, Achilles reinforcement, and an aggressive waffle high traction outsole. 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: 2.0 cm. Fastening: Slip On. Material Composition: Other Materials/Other Materials/Other Materials.