Aleema Keto's robe. These robes are the former property of Aleema Keto, who was the cousin of Satal and also the co-leader of the dark side cult known as the Krath. Being a master in the arts of Sith magic, she managed to seduce Ulic Qel-Droma, who would later go on to kill Satal and then assume leadership of the Krath alongside Aleema. Whoever wore these garments would find themselves with improved strength and wisdom, and they would also receive a small amount of assistance in their connection to the Force.
It is plausible that the Jedi Exile came into possession of these robes while journeying during 3951 BBY, during the time of the First Jedi Purge.
The item can only be equipped by a character with a dark side alignment. Furthermore, within The Sith Lords, the item's description erroneously claims that Aleema was at one time a Jedi.