It's not just leather and nylon - it's thick, full-grain leather plus breathable 1000 Denier nylon. Consequently, it's not just a boot - it's a Danner Big Horn GTX. The 100% waterproof GORE-TEX lining adds ultimate breathing comfort. Full length insole board for increased support. Vibram Dri-foot outsole for unmatched traction and underfoot support in the field. Ideal for big game hunting.