The Nike React Infinity Run Flyknit gives you non-stop cushioning with every mile. A design with more foam, it returns more energy, while an improved upper with zoned containment areas delivers a secure, lightweight fit while increasing airflow. Nike Flyknit upper secures your foot for stability. Soft and lightweight, it promotes better airflow to help keep you feeling cool. Foam at the forefoot and heel provides extra cushioning and a softer feel.