Read from the World of Warcraft client build files.
How Deep Earth Vestment Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Deep Earth Vestment 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
Deep Earth Vestment is part of the transmog set Deep Earth Vestments (Druid only). The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Deep Earth Vestment Fits
Other Items Named Deep Earth Vestment
2 other items in the current build are also called Deep Earth Vestment. 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 78757 (78752 to 78762) were usually added in the same batch as Deep Earth Vestment: the same quest line, zone, vendor or reward set.