I’ve struggled with the best arrangement for a long time. I’m in Florida, and do a lot of cycling and tennis, outside in the heat.
For what it’s worth, this is what I settled on. It’s not ideal, but I’m not sure what is. Belly bands look horribly hot, and, like you said, kydex seems most secure and safe, especially during physical activity.
No matter what, it seems there’s going to be no way to keep the gun from getting sweaty. For me, I haven’t seen where it’s affecting my plastic/stainless M&P. I replace carry ammo often, though, and clean/lube the gun immediately after it does get sweaty.
Anyway, I use a basic IWB kydex holster (a very cheap one from Amazon), and velcro on to it a pad from Sticky Holsters. The pad rides directly against my skin, allowing both my underwear and shorts waistband to hold the whole thing. By sticking slightly to my skin, it doesn’t seem to bounce around too much. I just weighed this setup and it’s 1lb 9oz, so it’s not real light, but not a brick. The pad can be removed and is easy to wash when it gets funky.
Having said all that, I’d like to see a better setup from anyone, as it’s not perfect and I’m always open to new ideas.
