Having been a part of Muck Boots\' line of wellingtons for nearly a decade these Arctic Sport boots have earned their positive reputation. Their warm fleece lining is designed to keep your feet cosy even when the temperature drops and is complemented by thermal foam underneath the footbed. Moulded midsoles and outsoles support your feet even when you\'ve been on them for a while to prioritise your comfort., 5mm CR Flex-Foam., Warm fleece lining., 2mm Thermal foam under the footbed., EVA contoured molded midsole., MS-1 molded outsole.