Breastplate: Armor for Soldiers
Source: Nav
Revelation 9:9, 17
They also had thoraxes like breastplates of iron, and the sound of their wings was like the roar of many horses and chariots rushing into battle. / Now the horses and riders in my vision looked like this: The riders had breastplates the colors of fire, sapphire, and sulfur. The heads of the horses were like the heads of lions, and out of their mouths proceeded fire, smoke, and sulfur.