I prefer them on my OWB holsters.
Like others have previously said, I only make them that way. I did one without it a year ago, and felt the pinch. Never again.
IWB is a must for me but with OWB i can go either way & i do carry a 1911 :smile:
I live in Texas where it is usually hot, so yes I do use a body guard on every holster (if available).