The Muck Arctic Commuter Casual Winter Boots are a wardrobe staple once the temperature drops. This all purpose winter boot delivers the comfort, warmth, and style that only a Muck Boot can deliver. The stretch-fit topline binding is snug around the calf to keep warm air in and cold air out. The Commuter Casual features fully insulated with 5mm Neoprene. A fleece liner is added to keep your feet warm to -40 degrees. EVA midsole cushions with every step. NEW multipurpose rubber outsole provides optimal traction and stability.