Rubber sole The Nike React Infinity Run Flyknit 2 is (still) born to run. Featuring a refreshed upper that offers style and support, the React Infinity 2 is just as comfortable as ever. Nike uses Flywire technology in the upper mesh to provide support throughout the midfoot while you run without sacrificing breathability. The Nike React foam reaches new heights in the Infinity 2, packing responsive cushioning mile after mile. It's natural rocker shape supports your foot through your whole gait and offers flexibility where you need it most. The high-stacked foam adds to the overall plush feel and performance while the built-up outsole adds durability and traction to your run. The React Infinity Run Flyknit 2 is one of Nike's most tested shoes, and it's ready to perform.