Nike Alpha Fly 2 Very lightly worn - 30 miles recorded on them Men’s 6 | Women’s 7.5 Bounce to the beat Zoom Air units and full-length ZoomX foam deliver Nike's highest energy return cushioning system, adding more bounce into every step. A thin rubber outsole enhances traction and allows for more ZoomX under the Zoom Air cushioning. The additional foam not only adds more bounce, but also helps improve transition from heel to forefoot. Full-length ZoomX foam offers an ultra-lightweight and responsive ride. It's built for speed but also provides cushioning. Full-length carbon-fibre plate delivers a sort of roll-forwards feel that makes you want to take on the next step. AtomKnit material on the upper has a contoured fit while being lightweight and super breathable. Specifically designed lofted heel pods use Flyknit yarns for secure, extended comfort and lightweight heel lockdown. Notched laces offer a secure but soft lace-up. An integrated knit tongue with lofted padding makes for a secure, repeatable fit that helps reduce lace pressure.