The Arctic Sport Boots, from The Original Muck Boot Company, will keep your feet warm, dry and very well protected in extremely cold conditions. They're fully lined with 5mm neoprene, with a stretch-fit top-line binding that seals the heat in whilst keeping the cold out, and a further 2mm thermal foam underlay for extra warmth. Underfoot you have a lightweight EVA midsole for added comfort and support, along with a rugged, grippy sole unit that gives you great traction. 100% Waterproof Fully lined with 5mm neoprene for flexibility Fleece lining for warmth 2mm Thermal foam under the footbed Lightweight EVA midsole for added comfort Rugged outsole for grip Double reinforcement on the instep, heel and Achilles area Pull-tab for easy on and off Estimated boot height: 42cm/ 17.1" Estimated max calf circumference: 42cm/ 17.1" Half sizes order up