F50 adizero is miCoach SPEED_CELL compatible. Purchase your miCoach SPEED_CELL separately. The miCoach SPEED_CELL is available for Mac/PC -Features Sprintskin upper that drastically reduces the adizero's weight. Innovative internal TPU support bands in the upper offer support and stability.Ultralight sockliner is carefully designed to not add bulk. Comes with second pair of comfort sockliners.Sprint frame for lightweight stability. TRX TPU outsole has a new stud configuration that improves your balance at top speeds. Weight: 5.8 oz.