Invisible (Status)

From FFXI Wiki

This status can be used to avoid the attention of any aggressive monster that detects by Sight. Note, however, that some have True Sight and see through it, so their line of sight should be avoided to prevent detection.

The Invisible status will wear off immediately upon being attacked or performing most other actions such as casting a spell or activating most abilities. Invisible also prevents interaction with many NPC targets such as doors and treasure chests.

Applied through