Vault 77 jumpsuit

The Vault 77 Jumpsuit was the standard Vault-Tec piece of clothing originally worn by the Puppet Man, the only inhabitant of Vault 77.

In Fallout 3, you can find it if you search the raider barracks in Paradise Falls. Next to it is a holotape labeled "Burn this Goddamn Jumpsuit." In it you hear an unnamed raider request that the jumpsuit be destroyed fearing that its former wearer may come back for revenge.