Per Nike: The Nike + R.T. Air Force 1 Boot is the most escalated expression of athletic looks in this collection. The Air Force 1 defined height when it debuted. Now that sense of support and fit is extended by using new manufacturing processes that take the shoe to knee height. An inner boot sits within a classic Force silhouette for unexpected elegance. That extension gives the Air Force 1 Boot new terrain for patterns, from the colored lines on the towering tongue to the swooping strips above the ankle. This is a new, taller form that capitalizes on contrast but still remains recognizable as an old favorite.