Clothing worn to protect a person in battle.
Key passages
1 Sa 17:5–6

A bronze helmet was on his head, and he was clothed with scale body armor; the weight of the body armor was five thousand bronze shekels. Bronze greaves were on his legs, and a bronze javelin was slung between his shoulders.

1 Sa 17:38–39

Then Saul clothed David with his own fighting attire and put a helmet of bronze on his head and clothed him with body armor. Then David strapped on his sword over his fighting attire, but he tried in vain to walk around, for he was not trained to use them. So David said to Saul, “I am not able …

1 Mac 6:35

And they divided the animals among the phalanxes and stationed for each elephant one thousand men, armed in chain mail and bronze helmets on their heads; and five hundred select horses were assigned to each animal.

See also
Ps 35:2; Is 59:17;