The following article is from NEWSARAMA, it's very detailed and obviously a lot of work has been put into it. I'm sure it's the most comprehensive account to the changing Bat-suit over the years, that has ever been pulished.
Some costumes are just iconic. People who have never read a comic will recognize it on first glance. It just has that staying power, so much so that changes to it are usually fairly simple and subtle. Because no one wants to mess with what works.
Someone who fits into this rare category is Bruce Wayne, AKA The Batman. Not only does this millionaire playboy wear expensive suits, but he gets to fight crime in the special cape, cowl and body armor of his nocturnal alter ego. So let’s take a look at how Batman’s standard uniform has evolved over the decades.