Slippery Skin( Exemplars of Evil, p. 26)
You can expertly avoid the grasp of your enemies.
Combat Reflexes (PH) , Escape Artist 9 ranks,
If a creature makes a touch attack against you to initiate a grapple, you can sacrifice one of your attacks of opportunity as an immediate action to make an Escape Artist check. You must use the check result in place of your touch Armor Class, even if the result is lower.