The Made in USA 990v6 arrives with a series of performance-inspired updates. The upper dispenses with the standard midfoot saddle, allowing the pigskin and synthetic overlays to flow from heel to toe across the mesh underlay for a streamlined look. While the evolved design marks one of the most dramatic generational evolutions the 990 has ever seen, perhaps its greatest leap occurs inside. The addition of FuelCell midsole cushioning means that the 990's progress can be felt as much as seen.