Danner's most popular work boot – now built in Portland, Ore. They developed new Vibram Quarry outsole and upgraded the midsole to a single, solid piece for increased longevity. Danner also updated the collar liner to be instantly comfortable and re-engineered the placement of the triple-stitching to reduce wear and tear over time. Using our universal 610 last, US-made Danner Quarry USA GTX Boots have the same fit and feel as its predecessor.