The Nike React Infinity Run Flyknit is designed to keep you on the run. More foam and improved upper details provide a secure and cushioned feel. Lace up and feel the potential as you hit the road. A Lightweight Fit An all-new version of Flyknit is stronger and more durable than previous versions. Lightweight and flexible, it features 3 distinct layers to help keep your foot secure. A Stable Feel Higher foam stack heights provide a softer feel. A wider shape provides a more stable ride, helping release energy with every step. A Smooth Ride The shape of the Nike React foam midsole provides support for the 3 phases of a runner's stride. It helps create flexibility at toe-off, a smooth ride at mid-stance and cushioning at contact.