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Designed specially for fitbit flex to protect the clasp loose and band fall off
This simple insurance will keep your Fitbit safe. Light weight and more flexible
Slide the ring over the clasp when you put on your wristband, simple as that
Note:Tracker or Wristband NOT included. Only 5pcs Silicon Fastener Ring for Fitbit Flex
The size of the silicone rings have been specially designed to fit the Fitbit Flex. It does NOT fit other activity trackers or wristbands
10 PcsQingsun Silicone Fasteners for Fitbit Charge Wristband-Fix the Clasp Fall Off Problem (Black) - B01N2L2NTB