|The following is based on Fallout Shelter or Fallout Shelter Online and some details might contradict canon.|
The bespoke attire can only be worn by male dwellers. It is comprised of a blue shirt, olive pants, red suspenders and brogues. When worn, this outfit provides the wearer with an additional 4 points to Endurance.
Found in lunchboxes.
If the disassembly of the outfit is successful, junk is rewarded:
Bespoke attire (1)
Free space in the storage room