Armor is a suffix that turns up on Head, Armor and Boots. It gives Armor: +6 to +10 at its lowest step, +218 to +302 at its best — and you need item level 116 before the best one can appear at all.

It comes up at weight 7 when the game rolls affixes, never doubles up with another affix that does the same job (armor), and it is what puts Toughness, Sturdiness, Plating, the Bulwark and the Citadel in an item's name — so you might pick up a Wand of Toughness.

23 Uniques lock it to a fixed number: Warden's Vow, Last Keeper's Lantern, The Anvil's Crown, The Quarry Warden's Brow, The Switchbacks and Sediment and 17 more.