Metal with Rhodium coating.
This model has been designed to complement those trackers with a wider display area and dimensions. With the Space, the side button on the Fitbit Charge is accessible as normal.
You are not sure if this model fits your tracker? Check our guide here
Not sure about your size? Print this guide
KEY: Make sure to print the size band at 100%, otherwise you will not get an accurate result for your Bellafit size.