comments:
It sounds goofy, but a bandeau bra (unpadded/no cups, basically a stretchy short tube) worn around your waist/belly between you and the gun can help in the same way an undershirt does but without having to wear another layer (big plus in hot climates) This sort of thing: https://a.co/d/0e1OyKcG
I'm in SE NC and we are officially in swamp ass season here.. I've been carrying a cc9 AIWB in a phlster enigma with one of phlster's small wedges. A trick I've learned for appendix carry in hot weather is wearing a cheap bandeau bra around your hips/belly/wherever the gun/holster sits. Sounds goofy AF I know, but getting a layer of thin wicking fabric between you and the gun but without having to wear an undershirt helps a lot. You can get cheap multi-packs of them on places like amazon: https://a.co/d/0chysjvv