Fountmail

This armor is a dazzling white suit of chain mail with an alabaster-colored steel collar that covers part of the face. You gain a +3 bonus to AC while you wear this armor. In addition, you gain the following benefits: - You add your Strength and Wisdom modifiers in addition to your Constitution modifier on all rolls when spending Hit Die to recover hit points. - You can't be frightened. - You have resistance to necrotic damage.

Source: Vault of Magic · OGL-1.0a · 5.1