Invest Armor

Type: Psionic
Sources: Races of Stone
Complete Psionic

You can charge your armor with additional protective qualities.
Prerequisite: Proficient with armor worn.
Benefit: You can expend your psionic focus to increase the armor bonus of the armor that you're wearing by 3. Using this feat is an immediate action (it can be used on another creature's turn) in reaction to being the target of an attack. You must decide whether or not to use this feat before the result of your opponent's attack roll is determined.