I got the bharvest nylon sport band. Love it! I have had a variety of bands over the years for my other watch but this one is super comfortable.
https://www.amazon.com/gp/aw/d/B0BLMY3RJS?psc=1&ref=ppx_pop_mob_b_asin_title
Also I picked up a rinke just because I am typically clumsy/not paying attention (ADHD) and was afraid I would break it day 1. While it doesn't look as nice as it does without, still looks very good with the chrome one.
https://www.amazon.com/gp/aw/d/B0B92G8QSR?psc=1&ref=ppx_pop_mob_b_asin_title