Vicious Embersilk Cape

Here is a list of all of the new profession-based PvP items that will be available to the public when patch 4.2, Rage of the Firelands, goes live:

List of Blacksmithing PvP Items [Blacksmithing]
List of Tailoring PvP Items [Tailoring]
List of Leatherworking PvP Items [Leatherworking]

Jewelcrafting PvP Items [Jewelcrafting]
Bloodthirsty Sapphire Ring <Recipe>
Bloodthirsty Sapphire Necklace <Recipe>
Bloodthirsty Ruby Signet <Recipe>
Bloodthirsty Ruby Choker <Recipe>
Bloodthirsty Amberjewel Pendant <Recipe>
Bloodthirsty Amberjewel Band <Recipe>

Inscription PvP Relics [Inscription]
Bloodthirsty Charm of Triumph <Recipe>
Bloodthirsty Eyeball of Dominance <Recipe>
Bloodthirsty Jawbone of Conquest <Recipe>

PvP Cloaks
Bloodthirsty Embersilk Cape <Recipe> [Tailoring]
Bloodthirsty Fur Cloak <Recipe> [Leatherworking]
Bloodthirsty Hide Cloak <Recipe> [Leatherworking]

What you're gonna need for a full Vicious Embersilk set:
Bolt of Embersilk: 82
Volatile Fire: 37
Volatile Water: 37