Unisex hunting boots. 5mm CR Flex-Foam. 2mm thermal foam under foot. Warm Fleece Lining. EVA Contoured Molded Midsole. MS-1 Molded Outsole. Comfort Topline. Temperature rating: -40C to 4C. 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: Warm Fleece. Sole: EVA. Ref: UTFS4315