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 provide soft responsiveness and long-lasting comfort, plus a wider forefoot for added stability. It's still one of our most tested shoes, designed to help you feel the potential when your foot hits the pavement. Ventilated Where Needed An evolved Flyknit upper features zones of breathability where you need it. It's strong and durable, helping to keep your foot secure with every mile. Flywire technology offers extra support and stability through the foot. Soft Feel, Higher Stacks Nike React technology is a lightweight, durable foam that delivers a smooth, responsive ride. The foam itself has a higher height for a softer feel. Shaped like a rocker, the foam provides support for the 3 phases of a runner's stride. It offers flexibility when your foot rises off the ground, a smooth ride when your foot is moving forwards and cushioning at ground contact.