Enhanced Armor (3.5e Feat)
From D&D Wiki
 Enhanced Armor [Racial]
Prerequisite: Any Mechanoid, except Bronze
Benefit: Your armor bonus granted by the breastplate is increased by +1.
Normal: The armor bonus is the same as for masterwork quality breast plate of that Mechanoid's type (Bronze, Iron, Mithral, Adamantine or Platinum).
Special: You can take this feat multiple times, its effects stack.
Note: Feat related to the Mechanoid race.