The Nike React Infinity Run Flyknit 2 ‘Black Metallic Gold’ delivers a performance silhouette engineered to reduce injury and keep athletes running. The black Flyknit upper features a wider shape for enhanced stability and integrated Flywire technology for a lockdown fit. The airy build is mounted on a grey Nike React midsole, rendered in a beveled shape that offers lightweight support during the three phases of a runner’s stride. Rubber pods under the forefoot and heel provide grippy traction.