Defies cold that cracks steel. Removable liner, tight seal, slides on fast. No bunching. No leaks. No time wasted. –40°C proof and snowmobile tested. 440,000 pairs later — still the one that shows up. Durable nylon upper:   Tough, flexible, built to handle deep cold and hard work. Thermal Guard insulation:   Keeps heat in when the mercury disappears. Rubber outsole:   Solid traction on ice, mud, and everything in between. –40°F / –40°C rating:   Made for the kind of cold that empties streets. Midfoot Velcro closure:   Fast on, fast off — even with frozen fingers. Material:   600D Nylon Detail material:   N/A Shell:   Synthetic Rubber Lining:   N/A Insulation:   8mm Thermal Guard Removable Liner Waterproof:   Waterproof Bottom Toe:   Plain Insole:   N/A Temp rating:   -40°C Closure:   Midfoot Hook & Loop Strap