NIKE InfinityRN 4 Running Shoe NIB

Nike's supercharged ReactX foam amps the energy return under a new-generation running shoe that still delivers the plush, smooth ride of earlier iterations.
 • Cushioning: absorbs impact and distributes weight for consistent, buoyant comfort under each step • Support: enhances the fit with targeted contouring and cushioning in the footbed • Energy return: transforms every heel strike into responsive, explosive forward movement • Lace-up style • Flyknit upper provides a snug, socklike fit that flexes with every movement • Removable, cushioned insole allows for custom orthotics • Nike ReactX foam provides more energy return than Nike React foam and leaves a smaller carbon footprint under every step • Synthetic and textile upper and lining/rubber and synthetic sole NIB