I've got these:

https://www.amazon.com/gp/product/B01M5FJOTE/ref=as_li_ss_tl?ie=UTF8&psc=1&linkCode=sl1&tag=tabletsforme-20&linkId=6d6f403a4bea2992075f06b96d26434a

https://www.amazon.ca/Truffol-2-Piece-Samsung-Frontier-Classic/dp/B01N44KP14

Standard bands will work fine but there are a ton of decently priced quick release bands on eBay and Amazon. They're really easy to swap out and I wouldn't suggest any bands that aren't quick release.

I've got these:

https://www.amazon.ca/Truffol-2-Piece-Samsung-Frontier-Classic/dp/B01N44KP14

https://www.amazon.com/gp/product/B01M5FJOTE/ref=as_li_ss_tl?ie=UTF8&psc=1&linkCode=sl1&tag=tabletsforme-20&linkId=6d6f403a4bea2992075f06b96d26434a

Edit: I can no longer recommend this band. Mine broke today after just a few months of usage. The end of the band ripped apart where the buckle attaches.

I really like this one.

Edit: Coffee is the color I like (this link). They make others.

https://www.amazon.com/gp/product/B01M5FJOTE/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1

It's not shiny, so it has a ruggedness that seems to fit the Frontier, but it still looks really nice. It's my go-to band when I'm not running. I have a black metal one too, but it feels cheap and it's harder to put on since the little pins always fall out.