Madman Set is an Attire or Armor in Bloodborne.
"Most tomb prospectors, members of the Healing Church chosen to explore the old labyrinth, are unable to withstand the weight of the old knowledge, and go mad.
This attire is worn by those lost souls.
Truth oft resembles madness, inaccessible to the dull of mind. Those who go mad are merely thoughtful souls who failed to reach any conclusions.
The appendages draped across them are said to be a kind of protective charm, or at least, that is what these lost souls believe with all their hearts."
- Has the lowest Frenzy resistance in the game (8 in total), which from a lore perspective makes sense, since it belonged to a madman.