Sorel CARIBOU men Snow boots in Black Leather, Available in men's sizes. 11. Waterproof nubuck leather upper Waterproof seam construction Washable removable and washable 9mm felt liner with Sherpa snow cuff Stack 2.5mm laminated felt antifreeze inserts Waterproof vulcanized rubber shell made by hand Sorel AeroTrac outsole does not hold snow or soil