For the neutral runner, the Nike React Infinity Run Flyknit 4 is the ideal all-round running shoe. Go for short or long runs; the React Infinity Run Flyknit does it all. This makes it suitable for both beginners and experienced runners. Experience the perfect balance between cushioning and responsiveness with this all-round running shoe! Midsole The shoe has a React foam midsole made of ethylene vinyl acetate (EVA) and thermoplastic elastomer (TPE). This unique combination of polymers ensures that Nike React foam is very responsive and cushioning. This foam is specially designed to reduce the risk of injuries while running. This makes the React foam one of the most complete foam types currently available. Upper The upper is made of Nike Flyknit. This is made of strong, but light yarns that are woven into one whole. Around the midfoot the material is more densely woven to provide support, while at the forefoot the material is made flexible and ventilated. Flywire technology replaces laces with high-tensile wires that act like suspension bridge cables and provide precise support. Outsole The shoe has a rubber outsole and provides good grip and traction while running. Get the most out of your run with the Nike React Infinity Run Flyknit 4!