Cloak of the Obyrith( Fiendish Codex I: Hordes of the Abyss, p. 85)
The chaos of the Abyss suffuses your being, as it does the ancient obyriths.
You gain damage reduction 1/lawful. The amount of damage reduction increases by 1 for each additional Abyssal heritor feat you possess.
You are careless when it comes to your own fundamental well-being and take a -2 penalty on Survival checks.