The Big Horn Sport Boot is full grained leather construction with Cordura nylon upper. Classic Goodyear welt construction makes this boot flexible, sturdy, and comfortable. Gore-Tex lining is waterproof. Insulation of 600 gram Thinsulate adds warmth. Double thickness footbed gives stability and cushioning and is removable for cleaning or replacement. Shank is lightweight nylon with Rubberlon Bog outsole. Brown.