the.com/suit of chainmail

means A flexible armor made of thousands of interlinked metal rings, worn to protect the body from cuts and slashes in combat.

from From 'mail,' tracing back through Old French 'maille' to Latin 'macula,' meaning 'mesh' or literally 'spot/stain' — the word originally described the net-like pattern of the links, not the material itself. 'Chainmail' is actually a modern redundancy: medieval people just called it 'mail,' since the chain-link structure was assumed; 'chainmail' only caught on later, possibly to distinguish it from plate armor once both were just old relics people argued about.