The Nike React Infinity Run Flyknit 2 continues to help keep you running. A refreshed upper uses Flywire technology that combines with Flyknit for support and breathability where you need it. The high foam heights provide soft responsiveness and long-lasting comfort. It's still one of our most-tested shoes, designed to help you feel the potential when your foot hits the pavement. Breathable Flyknit upper provides optimal airflow and superior comfort. Responsive ZoomX foam midsole offers maximum energy return with each step. Loop at the heel area enables an easy put on and take off style. Padded collar offers enhanced ankle support and high load management. Durable rubber outsole provides superior traction and grip for long-lasting wear.