Your options are the garmin hrm swim or garmin HRM tri strap with a garmin watch, which will give you HR data after the fact. The strap stores the data and syncs it to the watch when the workout is done.

Or, the new polar vantage watch (either M or V) gives you current optical HR in the pool. In my experience (11 swims so far) the optical HR is accurate enough when compared to an HRM swim that I've ditched my HRM swim chest strap and just swim with my vantage M. I wear the watch tight but was surprised how good it is. It's nice to actually see HR at the block.

Finis makes an ear clip hrm. It’s called AquaPulse.


Ant+ makes it about two inches underwater. I have a mio link optical hrm that I put on the underside of my watch band, and I get accurate readings while swimming. https://forum.slowtwitch.com/...ost=5572673#p5572673

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ECMGN Therapy Silicon Valley:
Depression, Neurocognitive problems, Dementias (Testing and Evaluation), Trauma and PTSD, Traumatic Brain Injury (TBI)