Go out for a run and leave all your worries behind with the React Infinity 4. Featuring soft, responsive React foam, and revisited with our best-fitting Flyknit material to date, you can take off anytime, anywhere without worrying about wear and tear. This shoe gives you invaluable peace of mind atesprit to go further, faster and longer than ever before. And it's all thanks to its higher foam thicknesses and intuitive design that offer maximum support for every stride. The curved, pendulum-shaped outsole gives you a more natural, high-performance stride, so you waste less energy with each step. It offers optimum flexibility on impulse, a fluid stride as your foot moves forward and perfect cushioning on contact with the ground. Nike React technology made up of light, resistant foam guarantees a fluid, responsive stride. Thick cushioning just below the foot means you're as close to the foam as possible, for an exceptionally responsive feel. The Flyknit upper ensures optimum breathability, so your foot stays firmly in place while benefiting from good ventilation. The water-repellent lining in the toe offers optimum protection when the weather turns nasty, so you can continue your activity in spite of the elements. The Flyknit tongue is adjustable and comfortable, to prevent chafing of the ankle and heel during long-distance runs. The elastic Flyknit support band on the inside ensures a secure, stretchy fit. The foam collar is soft to the touch and offers pleasant support. The outsole with extra rubber enhances grip and durability.