Read from the World of Warcraft client build files.
How Deep Earth Leggings Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Deep Earth Leggings 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 Leggings 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 Leggings Fits
Other Items Named Deep Earth Leggings
2 other items in the current build are also called Deep Earth Leggings. 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 78809 (78804 to 78814) were usually added in the same batch as Deep Earth Leggings: the same quest line, zone, vendor or reward set.