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 G. 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.