The Nike InfinityRN 4 represents an overhaul to the Nike Infinity React 3. The new version comes with both a wider base for stability and a wider fit to accommodate runners with wider feet. This running shoe packs in Nike’s new responsive React X foam for a smooth ride that will take you through however many miles you can throw at it. If you’re looking for a well cushioned shoe to keep you feeling good on easy runs, the Nike InfinityRN 4 is here for you.