Which innovative product design feature was first introduced by Nike in 2017 and claimed to improve running economy by 4%, sparking controversy and new regulations in professional running?

Test your knowledge of cutting-edge product design in the sports industry! The most successful sports brands constantly innovate to enhance athletic performance, improve comfort, and push boundaries. This trivia question focuses on a groundbreaking design feature that revolutionized a major sports category and created a new standard in athletic footwear technology.

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Nike ZoomX foam with carbon fiber plate (Nike Vaporfly)
Adidas Boost cushioning technology
Under Armour HOVR energy return system
New Balance FuelCell nitrogen-infused foam