Batman has worn a number of costumes over his eighty-plus-year history including the mysterious Suit of Sorrows. This armor was created in the late 12th Century by the Order of Purity, an offshoot of the Order of St. Dumas. The suit's original wearer was Sir Geoffrey De Cantonna whose battle prowess and efficiency became the stuff of legend. The battle rage bestowed upon him by the costume gave him the strength to defeat hundreds of his enemies but at the cost of his own sanity. His bloodlust and the horrific body count were blamed on the Moors, to absolve the Order of any blame.
Batman was given the armor by Talia, the daughter of his arch-nemesis Ra's Al Ghul. As with De Cantonna, Batman's prowess was enhanced exponentially. The Dark Knight fought well past the standard levels of human endurance, even with a badly broken arm. While Batman realized the Suit of Sorrows was a great tool, the way it pushed him beyond his physical and rational limits caused him to consider destroying it. In the end, he decided instead to lock it away in the Batcave.
Batman isn't the only DC hero to have worn or been affected by the Suit of Sorrows. The events of Grant Morrison and Tony S. Daniel's "Batman R.I.P." in Batman #676-681 led to the Dark Knight being listed as missing, presumed dead. At this time the Order of Purity reclaimed the armor and gave it to Michael Lane, the second official Azrael. The first heroic Azrael, Jean-Paul Valley, and Lane were originally the Order's instruments of divine retribution.
The legends surrounding the Suit of Sorrows told of the armor being bestowed with the fighting spirit of all who had worn it before, as well as the rage of Azrael, Angel of Death. Over the years wearing the costume took its toll, both mentally and physically, on both Lane and Valley. It was said that only those who were "pure of heart" were worthy of wearing the suit, but human beings are, by definition, imperfect creatures. Batman and Jean-Paul have proven themselves to be heroes countless times, but both have human failings and weaknesses.
Over the years Batman's suits have varied in style and power, from the rainbow and zebra bat-suits of the Silver Age to powered armor that allows Batman to go toe-to-toe against the likes of Superman and Darkseid. In "Endgame," the Dark Knight wore a suit of armor powerful enough to fend off a "Jokerized" Justice League. Unlike the suit of sorrows, however, most of these armors used up power and resources, rather than Batman's rage, psyche, or physical well-being. The closest in terms of having a cost of Batman's health was the "Hellbat" armor. This suit gave the Dark Knight superhuman strength and endurance but could end up killing the Caped Crusader if he used it for too long.
The original Suit of Sorrows may have been low-tech, but it proved to be a force to be reckoned with. The Dark Knight is a superhero without powers, yet he's arguably the most respected and feared crime-fighter in the DC Universe. He's had to don armor to win some fights, but it's his drive and heart that have ultimately earned him victory.