(2) Set: Feral: Ferocious Bite now refreshes the duration of your Rip on targets with 60% or less health. Guardian: Reduces the rage cost of your Savage Defense by 5.
(4) Set: Increases the duration of Barkskin by 3 seconds and decreases the cooldown of Tiger's Fury by 3 seconds.
Bonuses activate at 2 pieces and 4 pieces equipped.
Read from the World of Warcraft client build files.
How Deep Earth Headpiece Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Deep Earth Headpiece 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 Headpiece 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 Headpiece Fits
Other Items Named Deep Earth Headpiece
2 other items in the current build are also called Deep Earth Headpiece. 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 78789 (78784 to 78794) were usually added in the same batch as Deep Earth Headpiece: the same quest line, zone, vendor or reward set.