In Wrath of the Lich King it is item level 232, requires level 80 and is named Thrall's Kilt. In MoP Classic it is item level 245, requires level 80 and sells to vendors for 1c.
In the Appearances collection, Thrall's Kilt of Triumph is listed as Boss Drop. Appearance ID: 11828. 14 other items wear the same appearance; 12 of them are listed here.
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Thrall's Kilt of Triumph Compares
Who It Suits
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Thrall's Kilt of Triumph suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Transmog Sets
Thrall's Kilt of Triumph is part of the transmog set Thrall's Garb (Shaman only). The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Thrall's Kilt of Triumph Fits
Other Items Named Thrall's Kilt of Triumph
1 other item in the current build is also called Thrall's Kilt of Triumph. 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 48332 (48327 to 48337) were usually added in the same batch as Thrall's Kilt of Triumph: the same quest line, zone, vendor or reward set.