Freefall Legs

The Freefall Legs are a set of armor in Fallout 4.

Characteristics
As the name suggests, when both the right and left variant of the armor are worn, the Freefall Legs provide complete negation of fall damage to the player character.

Locations
The Freefall Legs are located at highest point of the interior of the Mass Fusion Building in a room on the 28th floor, inaccessible to the player unless they are currently using a set of power armor with the jet-pack power armor torso modification fitted.

Note: To get the Freefall Legs you must exploit the physics engine in a way that allows the player to run into a vertical wall but stay put, this is most easily done in the corners of the room where tiles have fallen off.