A never before seen feature, an "outrigger," would provide added lateral side stability. Hatfield knew his shoe, dubbed the Air Trainer 1, would be a great court shoe, but he wasn't sure it would work for running. He found out first-hand on a chilly evening in France when, wanting to take a jog but having only factory samples of the Air Trainer 1 on hand, he took a pair for a run through the snowbound streets of Paris. Running past the landmarks of the city, Hatfield knew he had his multi-purpose athletic shoe.
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