The Muck Boots Arctic Sport Mid Boot - Men's is a mid-height boot for extreme winter weather conditions. These boots provide warmth with a soft fleece lining and a 5mm neoprene inner boot for ultimate coziness in harsh cold conditions. The stretch-fit top-line binding keeps the boots snug to your legs to keep cold air out and warm air in, and provides a comfy fit for wide calves. An EVA molded sole increases the comfort, with an added 2mm thermal foam underlay for extra warmth. For those extra muddy or frozen days, the outsole is rugged, durable and offers ultimate protection with double reinforcement on the instep, heel and Achilles area.