Nike ReactX Infinity Run 4 Sail Crimson Tint Women's Running Shoes Size 10Brand new no boxNew internal Flyknit fit band offers elastic, secure supportWater-repellent liner in the toe helps keep you dry when the weather turnsCurved outsole helps your foot rock smoothly from heel to toe and through your stride to foot strikeReactX foam reduces the carbon footprint of the midsole by at least 43% compared to prior Nike® React foamSnug fit; Nike® recommends ordering a half-size upIN-SHOE COMFORT:Flyknit tongue is adjustable and plushFoam collar is soft and supportive to the touchMore room in the toe box adds comfortReactX foam gives you an incredibly smooth feeling, helping you push your limitsReactX foam delivers 13% energy return compared to React foam, helping you stay fresh and bouncy during your runSail/Vapor Green/Cargo Khaki/Crimson TintHJ7666-133S.0.5