Fitbit Zip Wireless Activity Tracker 2-Pack: Monitor your health and fitness with a friend or family member with this Fitbit Zip 2-pack. Discreet and water-resistant, Fitbit Zip makes it easy to track your activity throughout the entire day, stay inspired and celebrate success. Set goals, monitor your activity and track progress with these Fitbit Zips. These discreet, water-resistant wireless activity trackers help you maintain a path to a healthy and fit life, one step at a time.