Needs review
Source: Races of Stone

Description: Choose a type of exotic armor, such as mammoth leather or tumbler's breastplate. You understand how to wear that type of exotic armor properly.

Prerequisites: Base Attack Bonus +1

You are proficient with a specific type of exotic armor and take no armor nonproficiency penalties when you wear it.

Special

You can gain this feat multiple times. Each time you take the feat, it applies to a new type of exotic armor. A fighter may select Exotic Armor Proficiency as one of his fighter bonus feats