Hit the ground running and leave all your worries in the rearview in the React Infinity 4. Instilled with soft, responsive React foam and updated with our best fitting Flyknit yet, you can take off anytime, anywhere without all that wear-and-tear attrition living rent-free in the back of your brain. It's the kind of shoe that can grant you that priceless peace of mind to go longer, faster and farther than you've ever been before thanks to high-rise foam stacks and an intuitive design that will support every stride. A curved rocker outsole makes every step feel more natural and adds efficiency to your run, helping you waste less energy as you hit your stride. It offers flexibility when your foot rises off the ground, a smooth ride when your foot is moving forward and cushioning at ground contact.Nike React Infinity Run Flyknit 4 men's running shoes.