You are a master of using heavy armor to avoid damage.
Benefit: Whenever you are wearing heavy armor, you gain DR 2/–. This stacks with the DR gained from the Armor Mastery fighter ability and any DR gained from the material your armor is made from, but not with DR from any other source.
Adventurer’s Handbook: Genius Guide Volume 1. Copyright 2010, Super Genius Games. Authors: Owen K.C. Stephens and Stan!