Test your tenacity in the Baffin Endurance boot, from the Baffin Polar Series. Named after South Polar explorer Ernest Shackleton"s ill-fated ship, this men"s extreme cold-weather boot has a waterproof upper constructed from Timberwolf Leather and insulated nylon with an integrated Arctic Flex rubber foot. A back zipper enables easy entry; the topline drawcord is easily adjusted to keep out rain, snow and wind. Inside, the signature eight-layer inner boot system is expertly engineered to keep you warm and dry, even in temperatures as low as minus 148. The Baffin Endurance extreme mid-calf boot is finished with a premium polar rubber outsole that delivers steady traction and won"t crack in the cold. The pocket and carabiner on the boot"s shaft are handy extras.