The Nike React Infinity Run Flyknit is designed to help reduce injury and 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 technology is stronger and more durable than previous iterations. 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 is all about zonal performance, providing support for the 3 phases of a runner's stride—flexibility at toe-off, a smooth ride at mid-stance and cushioning at contact.