The Nike React Infinity Run Flyknit is designed to keep you running fearlessly and is fit for all levels of expertise. This shoe delivers on the promise of innovation with more foam and improved upper details for a secure and cushioned feel. The all-new Flyknit Loft technology is stronger, more durable and features 3 distinct layers to help keep your foot secure while providing a lightweight and flexible feel. Higher foam stack heights provide a softer feel while a wider shape helps release energy with every step. The shape of the Nike React foam midsole is all about zonal performance, providing support for the 3 phases of a runner's stride鈥攆lexibility at toe-off, a smooth ride at mid-stance and cushioning at contact. Less material in the shoe means you're closer to the foam, creating a softer, more responsive experience. Increased rubber at the outsole helps deliver superior traction and durability. Runs true to size.