Muck Boot® Men's Woody Max warm boot has kept hunters toasty for over a decade with a 5mm CR Flex-Foam fleece liner with the added 2mm thermal foam under foot. It's a proven combination at frigid temperatures embraced by hunters on the stand and in the blind. 5mm CR Flex-Foam Comfort topline Warm Fleece lining 2mm thermal foam under the footbed EVA contoured molded midsole MS-1 molded Rubber outsole Product Features: Outsole:MS-1 molded Rubber with aggressive traction Lining:Fleece Upper:5mm CR Flex-Foam Comfort Range:-40° to 40°F Height:17" Footbed:2mm Thermal Foam Midsole:Contoured, midsole EVA (Ethyl Vinyl Acetate) Foam Calf Circumference:16" Muck Boot Men's Woody Max Hunting Boot