Which revolutionary sports shoe technology was first introduced in 1979 and dramatically changed running footwear by embedding air cushioning units visible from the outside of the shoe?

The sports footwear industry has seen revolutionary innovations that have transformed athletic performance. From cushioning technologies to sustainable materials, these innovations have marked significant milestones in product development. This trivia question focuses on a pivotal moment in sports shoe history that changed the landscape of athletic performance and brand recognition. Test your knowledge of sports product development history!

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Nike Air technology with visible air cushioning
Adidas Boost foam cushioning
Reebok Pump customizable fit system
ASICS Gel shock absorption technology