Miguel Caballero is a clothing designer based in Columbia. Know what else is based in Columbia? The largest cocaine trade in the world! Hooray! Mr. Caballero saw that there was a market for the fashion-conscious drug lord and designed accordingly a line of bulletproof business wear.
Check out his site here. The clothes look deceptively normal for things that can stop lead traveling at around 900 feet per second. Especially the polo shirt. It makes sense that there would be rain coats and the like which you might as well just stick a bulletproof vest under, but polo shirts!? Awesome.