Run with confidence thanks to the responsive cushioning of the Nike Air Zoom Structure 24. Dynamic Fit technology gives breathable structure and support while a Zoom Air unit in the forefront is encased in a foam midsole to help give you a smooth transition as you move from heel to toe. Forward Drive: A Zoom Air unit in the forefoot offers responsive cushioning so every step helps create an energy return that drives you forward. When combined with our foam midsole, you get a firm, yet smooth and stable ride every time your foot hits the ground. Backed By Data: Data from hundreds of runners helped inform the placement of a crash-pad at the heel and cooling on uppers, providing function and performance right where its needed most. Extra cushioning supports runners who tend to overpronate during heel-to-toe transitions. Flexible and Tough: Durable rubber sole is built for mileage. Grooves are engineered for flexibility and stability.