Designed to protect feet from extreme cold conditions, Muck Woody Max Rubber Insulated Men's Hunting Boots are feature a fleece lining and 5 mm of internal neoprene for excellent heat retention properties. The stretch-fit topline and 2 mm thermal foam barrier under the footbed seal in heat while keeping cold out. The high-grade rubber exterior of these men's hunting boots adds additional waterproofing and toughness. Contoured to the foot's natural shape, the EVA molded midsole provides extra support. The rugged MS-1 molded outsole delivers excellent traction on snow and ice. These insulated hunting boots offer a comfort rating of -40 °F/-40 °C to 40 °F/4 °C.