Nike Air Max
Overview
Nike Air Max is a line of shoes first released by Nike, Inc.
Nike, Inc.
Nike, Inc. is a major publicly traded sportswear and equipment supplier based in the United States. The company is headquartered near Beaverton, Oregon, which is part of the Portland metropolitan area...

 in 1987. Since its introduction, Nike has frequently introduced new and updated models in the same product line.
The Nike Air Max shoe uses a large air cushioning unit at the heel which is visible from the side of the midsole in most models. Different types of Air Max cushioning include "Air Max2" which does not have the "holes" in the cushioning unit and is of high pressure, "Tube Air" which is visible in several small circles on the midsole of the shoe, "Total Air" which is basically just another word for full Air Max cushioning, "Tuned Air," which is a system of individual pods supposedly "tuned" to different areas of the foot.
 
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