Armor Born (3.5e Feat)
From D&D Wiki
Armor Born [General, Fighter]
You are strong enough that armor does not restrict your movements.
Prerequisite: Base attack bonus 12, Heavy armor proficiency, Strength 22, Dexterity 20, Medium size or larger, Endurance
Benefit: The character no longer has a maximum dex bonus from her armor or shield nor an armor check penalty. Her speed is not hampered in heavy armor, and she is considered as wearing light armor regardless the type of armor she is currently wearing. If she is a dwarf she also gains +2 to her armor bonus.
Normal: The character has a maximum dex bonus from her armor and shield. She also has armor check penalties.
Special: Fighters can take this as a bonus feat