Whether you're a farmer, construction worker or simply trudging across muddy fields, the Muckmaster is a reliable wellington boot with a rugged and dependable design. Handcrafted from natural rubber, this welly has an adjustable waterproof gusset for the perfect fit around the calf. 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 boots will make sure you stay dry and comfortable. Fully lined with 5mm neoprene for flexibility. 2mm Thermal foam under the footbed for extra warmth. Extended rubber overlay for extra protection. Lightweight EVA midsole for comfort. Durable lug outsole for grip. Adjustable calf gusset extends up to 7 cm/ 3". Estimated boot height 43cm/ 17.6". Estimated max calf circumference 50cm/ 20.3". Half sizes order up. Outsole designed for optimum use on soft, wet or loose ground.