The LaCrosse 14" Aero Insulator Boot keeps performance high even when the temperature dips. Built using AeroForm® technology, this snow boot offers comfort and durability. A molded polyurethane shell and fleece lining shelter your foot in a warm and comfortable interior while you're engaged in cold-weather activities outdoors. The thick dual-density polyurethane midsole and oversized shank work in tandem to provide cushioning, stability, and support. Active Fit with an adjustable neoprene gusset offers easy on and off with a secure fit, while the molded kick-off heel plate allows for hands-free removal. AeroForm® technology Active Fit with adjustable neoprene gusset Polyurethane-reinforced shin for durability Molded polyurethane shell Fleece lining Thick dual-density polyurethane midsole Oversized polypropylene shank Molded kick-off heel plate Comfort zone: -40 to 40°F Shaft Height: 14" Insole: Polyurethane Outsole: Winter Tread Upper: Neoprene