This outfit is a cleaner version of the lab coat. It provides no damage resistance whatsoever; instead, it adds 2 points to Intelligence. Ballistic weave cannot be applied to the Vault-Tec lab coat but can be applied to the dirty lab coat.
Wearing the coat prevents the use of any sort of armor padding and chest armor. Headwear can still be worn while wearing the coat.
The Vault-Tec lab coat can be obtained during the quest Human Error. After fighting your way to the sewer, you'll see two people wearing the lab coats. One of the people wearing this lab coat is hostile so you won't have to start a fight. The other lab coat is seen worn by Dr. Chambers, who can be killed for this outfit.
May be found as random loot inside containers throughout the Commonwealth.
Three can be found sitting on top of the lockers used as coffins in Vault 81's secret vault just before reaching Curie.