Vault Jumpsuit (Fallout: New Vegas)

Vault jumpsuits are articles of clothing

Gameplay
All jumpsuits with the exception of those from Vault 11 have no Damage Threshold, but provides a bonus of +2 to Speech and Melee Weapons and can be repaired with other vault jumpsuits. The Vault 11 variant has a DR of 1. The Vault 3 utility jumpsuit adds +5 to both Lockpick and Repair.

Behind the scenes
The Vault 24 jumpsuit was not intended to be a part of the game and remains unused in the game files.