>>1054598the best boulder holder for my girls is always something in microfiber so it's easy to wash and fast to dry. there are a couple of brands doing "anti-bacterial" sports bras but I don't think they're so great yet, sadly. I'll put a fine layer of neosporin under my boobs if I know I am going to be hiking and not able to take off the bra after, minimally, 8 hours.
if you're running, have some reason to be hanging upside down (i guess?), have ginormous jiggly knockers (over DD?), or expect any kind of excess jiggling to happen you just layer 2 bras like you would for the gym.