Armor of Hell

The Demon Knight's "Armor of Hell" provides normal armor DR, based on its type, in addition to making it more difficult to penetrate the demon's DR. The armor has a Max Dex bonus, armor check penalty, and speed reduction as normal for its armor type (so if a Demon Knight wears full plate and gets 1d8 extra DR, he also has a lower Defense due to his reduced Max Dex).

The Armor of Hell ability affects all of the Demon Knight's DR (natural and armor-based). This ability functions only for Demon Knights - another creature wearing the Demon Knight's armor gets only the normal DR for that armor type.