pf2e.fyi
From Pathfinder Core Rulebook, which isn't enabled.

Ethereal

ITEM 17
UNCOMMONMAGICAL
Price 13500 gp
Usage etched onto armor
Bulk —

An ethereal rune replicates armor on the Ethereal Plane.

Activate command
Frequency once per day
Effect You gain the effects of an Ethereal Jaunt spell. This doesn't require concentration and lasts for 10 minutes or until you choose to return to material form as a free action.
Craft Requirements Supply a casting of 9th rank ethereal jaunt.
Pathfinder Core RulebookOGL