I have found it makes it much more comfortable to wear an undershirt between the butt of my pistol and my love handle. The grips on my Glocks (both the ones I carry IWB) are still new so the checkering is pretty aggressive. Even if I don't wear it this way all the time, when I get in the car I tuck my shirt in between there.
You will love Comp-Tac. Cheers.