So I indicated a "Shoot me First Vest!". Here is how it works.
Heavy canvass safari or photographer vests are super for concealing a handgun worn on the belt. The problem is unless you look like a tourist it just scream "GUN!" to anyone familiar with concealed carry.
And criminals aren't always stupid when it comes to their own survival.
So if you do choose to wear a vest for gun concealment be aware that others not on your side can see also.