|The following is based on Fallout Shelter and some details might contradict canon.|
Make lists and check them twice. Santa: the original Overseer.”— In-game description
The Santa suit is a red suit with white trim, and includes a red hat with white trim. It provides +4 perception, +3 endurance and +4 charisma to its wearer.
- Reward for the questline Vault-Tec Saves Christmas!
When disassembling the following message: NO JUNK RECOVERED.
The outfit was added with the 1.9 update, two weeks before the start of the winter 2016 Holiday season, with events like Halloween and Christmas coming up.