Blending modern design and resilient cushioning the Jazz 21 is the latest edition of this legendary franchise. With a PowerFoam midsole that provides reliable cushioning with every stride and the introduction of FormFit for a precise personalized fit. Dynamic expansive mesh across the upper accommodates a wider range of runners while providing high breathability. With key upgrades to fit and underfoot cushioning the Jazz 21 delivers the essentials of a great running experience.