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

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/GUID-AAF5E5D5-08C2-4886-BA1D-1F411F370135-high.jpg https://www8.garmin.com/manuals/webhelp/vivoactive3/Shared/G...