I wear under armour compression heat gear. I like it because my pistol slides over it vs gets stuck to clammy/ sweaty skin and chafe. It also doesn't let my over shirt stick to sweaty or clammy skin resulting in fewer shirt front adjustments.For those that have been carrying a while... do you wear an undershirt of some sort along with you normal shirt to keep the IWB carry setup from getting all sweaty?
I didn't go buy it for carrying though, I have a handful of shirts for other reasons.