Men's Danner Sierra Boots 98397-63100 The USA-made Sierra is a versatile, three-season boot for the hunter who pursues a variety of game. The Vibram 1276 Sierra outsole tracks steadily over diverse terrain. GORE-TEX waterproof breathable lining and 200 grams of Thinsulate Insulation keep feet dry and warm, while the full-grain leather and Cordura upper combine with Danner's famous stitchdown construction for outstanding durability and stability underfoot. Features Fiberglass Shank Thinsulate™ Insulation GORE-TEX waterproof breathable lining Recraftable Waterproof, full-grain leather upper with breathable Cordura® nylon Vibram® 1276 Sierra outsole for traction in diverse terrain Made in the USA Handcrafted, stitchdown construction for strength and stability Danner® Airthotic® heel cradle and arch support Men's Danner Sierra Boots