As part of Breaking2 -- Nike's moonshot quest to enable a sub two-hour marathon time -- the company has developed the Nike Zoom Vapor Elite, a concept shoe individually-tuned for each athlete. What sets the shoe apart is the utilization of completely reimagined materials from decades of racing footwear, but each is used more intelligently, and more purposefully, than ever before. A principal component takes the form of a Nike ZoomX midsole, lighter, softer and more responsive than traditional foams, used in a distinctive 21mm forefoot stack heigh. The new tooling system comprises an ultra-light, ultra-resilient Nike ZoomX midsole and a unidirectional carbon fiber plate, with an athlete-optimized stiffness profile. There's also a 9mm offset, designed to minimize Achilles strain, and the unique "scooped-shaped" geometry of the carbon fiber plate provides a feeling of forward motion, along with bending stiffness, tuned to improve stride-by-stride efficiency. Check out detailed looks in the gallery below.