Spring-Heeled Sprint (Combat)Source Armor Master's Handbook pg. 11
You can move quickly without sacrificing your offense.
Prerequisites: Dex 15, Dodge, Mobility, Shot on the Run or Spring Attack, Spring-Heeled Style, base attack bonus +7, proficiency with light armor.
Benefit: While using Spring-Heeled Style, you can move up to twice your speed when using the Shot on the Run or Spring Attack feats