Muck Boots Arctic Sport Pull On Wellington Boot The boots have been in the line for nearly a decade and has proved its comfortable warmth throughout the northern reaches of the world. Additions: 5mm CR Flex-Foam Material Content: Rubber/Neoprene/Polyester fleece/Rubber Washing Instructions: Wipe Clean Lining: Other Materials Sole: Other Materials Upper: Other Materials Warm fleece lining 2mm Thermal foam under the footbed EVA contoured molded midsole MS-1 molded outsole Comfort topline