Read from the World of Warcraft client build files.
How Korloff's Raiment Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Korloff's Raiment suits Assassination, Outlaw and Subtlety Rogue; Brewmaster, Mistweaver and Windwalker Monk; Balance, Feral, Guardian and Restoration Druid; Havoc, Vengeance and Devourer Demon Hunter.
Transmog Sets
Korloff's Raiment is part of the transmog set Mogubreaker Battlegear (Rogue, Monk, Druid and Demon Hunter only). The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Korloff's Raiment Fits
Other Items Named Korloff's Raiment
2 other items in the current build are also called Korloff's Raiment. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Blizzard numbers items as they are created, so the named items next to ID 81573 (81568 to 81578) were usually added in the same batch as Korloff's Raiment: the same quest line, zone, vendor or reward set.