This heavy duty winter boot style is NL1005, and is highly regarded for blizzard conditions and extreme cold (heavy snow, trekking shoveling), features a seam-sealed waterproof nubuck or suede leather upper, thick rubber shell, and a comfort rating down to -40 degrees F. The liner is removeable, washable, and is a recycled felt inner boot with a Sherpa pile snow cuff (the beige Sherpa sticking out of the top). The boot has an AeroTrac non-loading outsole for grip in slush and snow, and the midsole has a bonded felt frost plug to insulate the foot from the cold ground. Great condition, worn very little.