I want to buy some after market bans, more like Apple Watch sports band
Since the watch is pretty new most of the band compatibility is with older models like Vivoactive 3, etc.
Are 20mm bands for other mothers compatible?
It's the same bands for a va3, 245, and 645. The 20mm QR bands.
Yep. I got a black band from Garmin to replace the gray that came with my non-music watch that's actually a 645 band and it fits great.