Fitbit Inspire HR band holder / loop

A simple replacement for the Fitbit Inspire (HR) band holder/keeper/loop/retainer, mine was so worn down it teared apart.

Printed with Real Filament White TPU 98A on a Prusa Mini+. 

It is a tight fit. You could try a more flexible filament or slightly scale up the model to make it easier to pull the loop over the metal buckle on the watch strap.