Armor-type items modify a player or mob's armor scores when worn. They are the only item type that can modify each armor score (bash/slash/pierce/exotic) separately.
Armor scores modify incoming melee damage from 50% to 200% depending on the receiving character's armor scores -- lower is better.
The calculation for armor scores' reduction depends on the player's level and the type of incoming damage, but only reduces damage of auto-attacks. The full calculation is:
- 500 x (3 x victim_level - ( 100 - armor_score ) ) / ( 300 + ( victim_level x 3 ) ) + 100
... capped at 50% and 200%.
Armor items can be enhanced with the Merchant class's Enchant Armor spell.