The Muckmaster has been around for years with its super warm insulation and thick rubber coating it can handle tough wet conditions all day long. 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 Suitable for men and women Hard-wearing outsole designed for optimum use on muddy surfaces Estimated boot height 43cm/ 17.6" Estimated max calf circumference 43cm/ 17.3" Measurements based on a size 8, variations may occur across sizes Half sizes order up US Men's Sizing Muck Boots Muckmaster High Commercial Grade Insulated Waterproof Boots