
I bought a Fitbit specifically for a cardio tracker, but the silicone strap burned through. (I know silicone is inert, but sweating irritated my skin). I wanted a metal or leather strap and found these. It contained both a metal link belt and a metal mesh belt. The Revain list does not specify how they close down. The tie strap was a regular clasp (press and fold) and the mesh strap has a magnetic clasp (just a strong magnet that snaps itself into place). connector tab and push out the pins. There is no need to attach a strap to the Fitbit as it also includes additional quick release pins (similar to standard pins). Both breathe very well and are a great relief to my skin while keeping the Fitbit taut for heart rate. Monitor for work! My wrist is ok. 7" and they can go larger/smaller in either direction and should fit most adults!

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