DESC: Ideal if you're a runner with an under-pronated to neutral step who's looking for a lightweight running shoe that features a supportive upper and offers a uniquely soft, yet resilient ride. Features an arch bridge midfoot shank that adds support under the medial arch, while also allowing a degree of torsional flex to unlock the foot's natural stabilizing mechanisms and encourage a smooth, efficient stride. The Nike Zoom Start + Running Shoe actually talks to your iPod nano (Nike+iPod Sport Kit required). It's as simple as putting on these shoes and starting your run. Nike+ pocket under the sockliner provides a secure place for the sensor, which is virtually unbreakable.