• Vestments of the Blind Denizen
• Item Level 239Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
  
• Leather
• Chest
• 609 Armor
• +74 Stamina
  +92 Intellect
  +78 Spirit
• Yellow Socket
  Red Socket
  Blue Socket
• Socket Bonus: +9 Spell Power
• Durability 120 / 120
• Requires Level 80
• Equip: Improves haste rating by 69.
  Equip: Increases spell power by 122.
• 
• Sell Price: 11 27 73

Source

This item drops from General Vezax on hard mode in the 25-man version of Ulduar.

Patch changes

•  Hotfix (2009-05-21): Will no longer have class restriction.
  
• Patch 3.1.0 (14-Apr-2009): Added. 
  

External links

• Battle.net (EU)
• Wowhead
• Thottbot
• WoWDB