The versatile Nike React Infinity Run Flyknit 4 delivers consistent comfort, an ideal all-round running shoe for your daily run. Experience the ultimate performance of the React Infinity Run Flyknit 4 every day. Midsole The midsole is made of React foam, a combination of thermoplastic elastomer and ethylene vinyl acetate (EVA) that Nike combined to create the Nike React foam. Due to this unique combination, the Nike React foam offers great cushioning and responsiveness. Nike uses this foam to minimize running injuries, making it one of Nike's most complete foams. Upper The upper is made of Nike Flyknit. This is made of strong, yet lightweight yarns that are woven into one whole. Around the midfoot, the material is woven more tightly to provide support, while at the forefoot the material is made flexible and breathable. The shoe has a knitted upper. This makes the material seamless and ensures that it can stretch in all directions with the foot. The knitted upper has a high breathability so that your feet stay cool. Flywire technology replaces laces with high-tensile wires that work like suspension cables and provide precise support. Outsole With a rubber outsole, the shoe provides good grip and traction while running. Order and discover the versatility of the Nike React Infinity Run Flyknit 4 within a few days.