The Muckmaster tall boot provides comfort in extreme conditions. With a stretch-fit top-line binding, these work boots stay snug to your calves; keeping warm air in and cold air out. The classic Muck Boot neoprene adjusts to the unique contours of your foot and the air mesh lining lets your feet breathe, making these commercial-grade work boots flexible, 100% waterproof and comfortable. The thermal foam underlay and the EVA moulded midsole provides optimum comfort and warmth underfoot. These high-performance work boots have extended rubber overlays and durable outsoles for ultimate protection and stability. No matter the weather conditions you\'re working in, these wellies will make sure you stay dry and comfortable. 100% Waterproof Fully lined with 5mm neoprene for flexibility 2mm Thermal foam under the footbed for extra warmth Breathable air mesh lining Extended rubber overlay for extra protection Lightweight EVA midsole for comfort Durable lug outsole for grip Reflective pull-tab for easy on and off Estimated boot height 43cm/ 17.6\" Estimated max calf circumference 43cm/ 17.3\" Half sizes order up Outsole designed for optimum use on soft, wet or loose ground Breathable Airmesh Lining Calf-High Extended Rubber Overlay 2mm Thermal Foam Under the Foot Bed 5mm CR Flex-Foam EVA Contoured Molded Midsole MS-1 Molded Outsole Comfort Topline CR Flex-Foam adjusts to the unique contours of your foot to create a comfortable and stable foundation while resisting blisters and chafing