Cloak of invisibility

A forcefield that can render you invisible as you walk in dangerous passages and along the highways in the service of the Brotherhood. It is used particularly by K-17 and the legions of the Cosmic Secret Service. K-17 says

There are definitely times, as you will learn from my legions, when it is important to walk the earth incognito. When you realize you are in the camp of the enemy and you are there to gather information and to learn what you can learn for the sake of the light, then you remain in the folds of the cloak of invisibility and your very conscience and soul tell you that silence is golden, that discretion is the better part of valor.

Sources

Mark L. Prophet and Elizabeth Clare Prophet, The Masters and Their Retreats