"A warm and comfortable winter boot that lets you match the outsole to the conditions outside, Korkers Polar Vortex 1200 Winter Boots for Men keep you upright and enjoying comfortable feet. Featuring Korkers' OmniTrax interchangeable outsole system, this high-performance winter boot allows you to switch between different outsoles to match the winter conditions outside. Made with 100% waterproof/breathable bootie construction, the Polar Vortex 1200's waterproof leather uppers keeps feet protected and bone dry. 1,200-gram 3M Thinsulate Insulation inside helps lock out the cold during intense adventures like snowshoeing and hiking. Molded thermoplastic polyurethane (TPU) toe caps with recessed stitching up front add extra abrasion resistance, while the molded heel counter at the back of the boot adds additional protection and superior support. Premium aerogel frost barrier footbeds under the feet cushion every step and block out cold for greater comfort. The Polar Vortex 1200 also comes with a low profile BOA M4 fit system for a tight and comfortable fit you can lock in with just 1 hand. BOA delivers micro-adjustable, precision fit, engineered and guaranteed to perform in the toughest conditions. Comes with SnowTrac Winter Rubber Lug outsole. Comfort rated down to -60F. Avg. Ht.: 11"". Avg. Wt. Per Pair: 4 lbs. 4 oz.Manufacturer style #: OB9901BK. Warm winter boots with Korkers' customizable outsole technology Comfort rated to -60F OmniTrax interchangeable outsole system match outsoles to the conditions outside Comes with SnowTrac Winter Rubber Lug outsole Waterproof leather uppers 100% waterproof/breathable bootie construction 1,200-gram 3M Thinsulate Insulation for extreme cold conditions Molded TPU toe caps with recessed stitching Molded heel counters Premium aerogel frost barrier footbeds Low profile BOA M4 lacing system for fast and easy custom fit with just 1 hand BOA delivers micro-adjustable, precision fit, engineered and guaranteed to perform in the toughest conditions"