• Duskbat Drape
• Item Level 52Disenchants into:
  [Small Brilliant Shard]: 1
• Binds when picked up
• Back
• 37 Armor
• +14 Agility
• Equip: Improves hit rating by 10.
• 
• Sell Price: 94 44

Source

Rewarded from the Sunken Temple Rogue quest [52D] The Azure Key.

Note

The cape used to grant reduced damage from falls, but was changed in patch 3.0.2 to its current form. This is possibly due to the new Glyph of Safe Fall available to rogues.

Patch changes

• / Patch 3.0.2 (14-Oct-2008): No longer reduces falling damage. 
  
• Patch 1.7.0 (13-Sep-2005): Added. 
  

External links

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