Perfect for the road, your updated Men's Nike ZoomX Invincible Run FK 3 took everything good about the 2 including its beloved rocker shape and bouncy foam, and just cinched up areas that needed perfecting. You know the spots on your foot that get really sweaty after a tough run? A refreshed flyknit upper includes extra breathing room in those zones for more airflow and an even better experience over long distances. With improved tooling in the fit, materials, and the way it rides, you won't want your next run in your Zoomx Invincible Run FK 3 to end.