Vault jumpsuits are worn by the inhabitants of the vault that is represented by the number on the jumpsuit.
There are eight numbered vault jumpsuits in Fallout 4, including the Vault 101 jumpsuit that is not present in the game, the Vault 75 and Vault 95 jumpsuits which are unobtainable without console commands or mods and the Vault 118 and Vault 88 jumpsuits that require their respective add-on.
Bobby De Luca's can be obtained without committing a crime, if he is insulted and turns hostile during Dependency.
If Tina De Luca is recruited to a settlement, her vault jumpsuit can be obtained by trading her a different outfit and equipping it.
Trader Rylee wears one, but it cannot be obtained without pickpocketing or murder, even if she is recruited to a settlement.
One can be acquired from an NPC in a random encounter, that serves to make the player character aware of the existence of Vault 81.
A child version is worn by the children of Vault 81, which lacks the Energy Resistance of the adult version. If one leaves and comes back, all of the guards and overseers will spawn with a new suit but the other residents will not.
88号避难所连身装[]
One jumpsuit can be found inside Vault 88 on a Vault 88 steamer trunk near the vault door entrance. The steamer trunk itself contains 10 more and has its inventory refilled as soon as one exits the vault. 20 more can be found in the workshop inventory. Lastly, the Legend of Vault 88, a unique version of the jumpsuit, is rewarded upon completion of Lady Luck.
Two in the room immediately after the vault door, in an opened box atop a stack of other boxes.
Three in the first room on the right: two on the floor, one in the shelf.
One to the right of the laundry room in a shelf atop a box.
One in the central room, ground floor beneath the overseer window on top of a box.
Four in the last room leading back to the Park Street station cell part of the vault: one on the desk next to the terminal, three in an opened box nearby.
118号避难所连身装[]
One jumpsuit can be found at the entrance to Vault 118, on the receptionist's desk.
Upgrades[]
The Damage Resistances of vault jumpsuits can be upgraded at any armor workbench. However, they cannot be upgraded with ballistic weave.
↑The Art of Fallout 4, Page 16: "For the iconic yellow stripe, we went with a metallic gold foil that serves as a heat-dissipation strip and works with the biometric sensors integrated into the suit."
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