Wolverine Men's Big Horn ST-W 75% Leather/25% Nylon Imported Rubber sole Waterproof full-grain leather with 1000 denier cordura Gore-tex waterproof membrane to keep your feet dry in the wettest of conditions 600 grams of thinsulate ultra insulation to keep your feet warm in cold climates while providing breathability Goodyear welt construction combined with a Wolverine rubberlon bob outsole for extreme durability that will withstand the toughest conditions