Compatible With Fitbit Alta Alta HR Item Description Upgrade the look of your Fitbit Alta or Fitbit Alta HR Fitness Tracker using this fitness tracker watch band replacement from Zodaca. Made of durable TPU (thermoplastic polyurethane) and metal it is resistant to sweat and water making it great for use at the beach or swimming pool. Installation is easy. Simply remove the old watch band from your Fitbit fitness tracker then install this blue watch band replacement. Designed to fit smaller wrists it can be adjusted to fit wrists ranging from 5.5 to 7.5 inches in circumference. To measure your wrist size wrap a piece of string around it then measure the string from the end to the point where it crosses over the end using a ruler or tape measure. This fitness tracker replacement band is blue with a silver buckle. Please note that the Fitbit fitness trackers pictured in the images are NOT INCLUDED.