Which groundbreaking design feature did Nike introduce in 1978 that revolutionized running shoes and later became the foundation for their most successful product lines?

The sports footwear industry has been transformed by revolutionary design concepts that addressed athlete needs and changed performance forever. Behind many iconic products are fascinating stories of innovation, market challenges, and design breakthroughs. This question explores a pivotal moment in sports product design history that reshaped an entire category and brand trajectory.

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Air cushioning technology
Waffle sole pattern
Visible heel support system
Flywire support cables