The Air Max 90 is one of the most interesting shoes of the series simply because of its colorway: Infrared. By surrounding the Air unit with a bright color, focus was solely on the function of the shoe. But any color could have been used to highlight the function of the shoe—pink, orange, blue, magenta, yellow. Name a color and it would have worked on the Air Max 90.After five years, it was time to evolve. The Air Max 180 no longer limited Air Max to a simple pocket. It moved into a full 180-degree piece that was in direct contact with the ground.
Instead of being sandwiched between a midsole, rubber and the ground, The Air Max system was rugged enough to be exposed on the outsole. It may not sound like a lot, but eliminating one area of material is huge because it opened the doors for further innovation.A year after evolving Air Max to 180-degrees of cushioning, it was time to give the Air Max 93 a 270-degree Air unit. The pocket now became an Air bag. It also caused the silhouette to be referred to as the Air Max 270. The area of cushioning grew from the midfoot area of the shoe to the full heel. Another important piece of this shoe was the upper. It featured a full-length inner bootie that provided excellent fit.