Vault Jumpsuit (Fallout 3)

Vault jumpsuits are clothing articles

Gameplay
There is a jumpsuit for every vault that appears in Fallout 3, although two of them are only found in the game files. It provides a Damage Resistance of 1 as well as a bonus of +2 to Speech and Melee Weapons, and can be repaired with other vault jumpsuits.

Dialogue
Other characters in game have unique dialogue for when the Lone Wanderer is wearing a vault jumpsuit. Lucas Simms will make a comment when the Lone Wanderer enters the town for the first time. In Megaton, Billy Creel, Jericho, and Leo Stahl will also make remarks about the suit. Instead of calling the player character a wastelander, other characters will comment on the Lone Wanderer being a former inhabitant of a vault.

Behind the scenes
Adam Adamowicz described his inspiration for vault suits in the Conceptual Design developer diary, prior to the game's release.