Based on the prototype shoe worn by Eliud Kipchoge when he unofficially broke the two-hour marathon barrier in October 2019, the Air Zoom Alphafly Next% ‘Lime Blast’ is a performane runner. Built with the lighter, more breathable AtomKnit, the shoe’s upper is supported underfoot by a ZoomX midsole with Zoom Air in the forefoot. A carbon fiber plate provides stability.