Nike Lunar Hyperworkout+ Sportpack is a revolutionary training shoe that features pro athlete-led drills and workouts designed to get you fitter, faster and stronger. Embedded sensors track every rep of every drill and sync directly to your mobile device, making it easy to connect with friends, compare progress and challenge each other. Nike+ sensors measure how hard, fast and often you train. Nike+ Training app turns training into a game. Features the latest version of Flywire technology that's made of super-strong, ultra-lightweight nylon cables. The dynamic cables tighten during multi-directional movements and sudden bursts, enhancing support and lockdown when you need it. The neoprene-inspired innersleeve acts as a baselayer, conforming to the foot for lightweight comfort and support. Lunarlon cushioning features a soft, yet resilient foam core encased within a supportive foam carrier to provide lightweight, ultra-plush cushioning, springy response and support. For added comfort, a cushioned pod is located at the back of the heel. Outsole flex grooves allow for fluid, stable, multidirectional movement. Sport Pack includes two Sport Sensors, one Sport Charger and one Sport Adapter. Wt. 6.5 oz.