Armor Proficiency (Medium)

 
Prerequisite(s): Armor Proficiency (Light)
 
Benefit: Wearing an armor type with which you are proficient means the armor check penalty only applies to the following skills: Balance, Hide, Escape Artist, Jump, Move Silently, Sleight of Hand and Tumble.
 
Special: Fighters, Paladins, Clerics, Barbarians, Druids, Artificers, Favored Souls, Psychic Warriors, Samurai and Bards gain this feat at first level for free.
 
Source: Players Handbook