The Bible calls this armour, Breatplate of Righteousness. When the Bible talks about Righteousness, there may be two meanings.
Secondly, the Breastplate of Righteousness also means the righteous acts that flow out from that position. Do what is right in the eyes of God. Putting on this armour means you are willing to follow the orders of our Commander in Chief, Jesus Christ! A soldier must follow orders. The letter of James says it plainly, Faith without works is dead!