You are skiled at dodging past opponenets and avoiding blows.
Prerequisites: Dex 13 , Dodge.
Benefit: You get a +4 dodge bonus to Armour Class against attacks of opportunity caused when you move out of or within a threatened area. A condition that makes you lose your Dexterity bonus to Armour Class (if any) also makes you lose your dodge bonuses. Dodge bonuses (such as this one and a dwarf's racial bonus dodge attempts against giants) stack with each other, unlike most types of bonuses.
Special: A fighter may select Mobility as one of his fighter bonus feats (see page 38).
Source: Player's Handbook