Product 23cm Nike Running Shoes ReactX DR2670-300 Condition New, Unused Nike Women's ReactX Infinity Run Flyknit Shoes L Running Shoes DR2670-300 ● The latest Nike InfinityRN 4, a renewal of a popular model, pursues smooth running with supportive cushioning. It uses newly developed Nike ReactX foam, offering a 13% increase in energy return compared to Nike React foam. This allows for a more resilient stride that reduces fatigue. (Furthermore, Nike ReactX foam reduces midsole carbon emissions by over 43% compared to traditional Nike React foam). ● The combination of Flyknit, known for its superior fit in Nike Running, and ReactX foam. The secure upper support and breathability allow you to run anytime, anywhere. The design provides support with every step, offering invaluable peace of mind for those who run faster and farther. The carbon emissions of ReactX are based on an assessment review from raw material acquisition to shipment conducted by PRe Sustainability B.V. and Intertek China. Other midsole components such as airbags, plates, and other foam manufacturing are not included in the assessment criteria. ● New Features of Nike InfinityRN 4 The latest model of the Nike InfinityRN 4 maintains its comfortable and smooth ride while enhancing support with the newly developed ReactX foam. The improved Flyknit upper and wider toe box provide a stable and secure fit. ● Exceptional Cushioning The more cushioning underfoot, the softer and more comfortable your run. Cushioning helps absorb impact upon landing. ReactX foam provides an incredibly smooth ride, supporting you as you push your limits.