You are fleet of foot.
Benefit: When running, you move five times your normal speed (if wearing medium, light or no armor and carrying no more than a medium load) or 4 times normal speed (if wearing heavy armor or carrying a heavy load).
If you make a jump after a running start (see the Jump skill), you gain a +4 bonus on your Jump check. While running, you retain your Dexterity bonus to AC.
Normal: You move four times your speed while running (if wearing light medium or no armor and carrying no more than a medium load) or three times your speed (if wearing heavy armor or carrying a heavy load), and you lose your Dexterity bonus to AC.
Source: Player’s Handbook (version 3.5), page 99.