Benefit: When a character wears a type of armor with which he or she is proficient, the character gets to add the armor's equipment bonus to his or her
Defense. Also, the armor check penalty applies only to
Balance, Climb, Escape Artist, Hide, Jump, Move Silently, and Tumble checks.
Normal: A character who wears armor with which he or she is not proficient adds only the armor's nonproficient equipment bonus to his or her
Defense. Also, he or she suffers its armor check penalty on
attack rolls and on all
skill checks that involve
moving.