[reaktion]

I use a vivoactive 3: it has combination usb/charging port[1] that's completely waterproof and designed to be used while swimming. I believe most garmin watches share the same port design.

[1] https://www8.garmin.com/manuals/webhelp/vivoactive3/Shared/G...

[Molpot]

I wasn't aware of that, thanks for telling me!