Run beyond your limitations in the Nike React Infinity Run FK 3. The third edition of a world-renowned design comes with a breezy Flyknit upper that cools your feet with every step. Equipped with Nike React technology for the perfect amount of cushioning, these shoes assure optimal comfort with soft padding around the collar. Once you slip into the Nike React Infinity Run FK 3, the possibilities are infinite. Nike React Infinity Run FK 3 features: Unique rocker design provides support during all three phases of your stride. Hybrid tongue delivers a sock-like feel. Increased rubber at the outsole combines traction and durability.