Item Armour is a glitch in The Dark Descent and Justine which allows the player to hide within the collision of a lift-able object to completely negate damage from enemies. This is useful to skip the mixture puzzles in Storage and Prison North in Any% No Major Glitches.
How-to
This is simply done by moving into the object by holding it, whilst the object is pushed against an immoveable structure, such as a rockslide. Sometimes it can be a good idea to crouch as well.