A stylish cloak with an inner lining of a different color fabric than the exterior.
Description in The Ivalice Chronicles
The vampire cape, also known as the Dracula Mantle in the PlayStation version, is a cloak in Final Fantasy Tactics worn in the accessory slot by any human unit to grant a chance to evade enemies' attacks.
Obtained
The vampire cape is bought for 15,000 gil from any outfitter after the events at the Walled City of Yardrow in chapter 3, "The Valiant".
A vampire cape is found with the chemist's Treasure Hunter movement ability as a rare treasure at the Limberry Castle Keep (0,10 
; the treasure is in the far left-hand side corner) one-time battle. The lower the treasure hunter's bravery, the greater the chance for them to find the rare treasure over the common treasure (potion).
Human enemy units with random gear may spawn wearing a vampire cape from level 49 onwards. The player can then steal it (though the cloak itself makes stealing from the unit harder, as the target may evade the player's attempts), potentially loot it from the enemy's treasure chest once they perish, or invite the enemy to join Ramza's company.
The vampire cape is rarely (⅛ chance) poached from a mindflayer, potentially letting the player get it earlier than it becomes available at the outfitters. The player can tame any mindflayer-type monsters (such as from Zeirchele Falls), let them breed in the roster until mindflayers spawn, and then bring them to battle and poach them. In The Ivalice Chronicles, the player can load their most recent auto-save if they get the common carcass and keep trying until a rare carcass drops. The poachers' den opens in chapter 3, "The Valiant", when Ramza's company has a member with Poach equipped.
Use
The vampire cape gives 28% to physical and magick evasion from all sides; cloaks are the only type of equipment able to evade attacks directly from behind (though a unit may still avoid damage from behind with reaction abilities). The evasive stats can be doubled to 56% with Evasive Stance or the ninja's Reflexes support ability.
A human unit's evasive options are Parry, a shield, or a cloak, cloaks being the only type of gear most of the time to protect against evadable magick spells, though some magick-deflecting shields exist. Many types of evasion gear can be equipped at once to further boost evasiveness. Evasion gear helps any unit who does not spend a lot of their time charging (Aim, spellcasting, etc) or performing (dance/sing), as evasion is disabled during those times. A cloak could be especially good for a chemist to help them survive a battle, or a knight to bolster their evasion further alongside a shield and Parry. Beowulf Cadmus could do well wearing a cloak, as his templar abilities are instant, but his low bravery makes his reaction abilities less reliable to protect him from attacks.
Those units who benefit from higher magick power may prefer to keep using the preceding mage's cloak.
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Crush Accessory.
High-level human enemies may spawn wearing a vampire cape. It may be worth destroying their cloaks with Meliadoul Tengille's and/or Cidolfus Orlandeau's Crush Accessory to make further attacks and steal attempts against them land more consistently.
The next, and final cloak to become available at outfitters is the featherweave cloak after the events at Fort Besselat in chapter 4, "In the Name of Love".
Etymology
Vampires are mythological or folkloric beings who subsist by feeding on the life essence, generally in the form of blood, of living creatures. Although vampiric entities have been recorded in many cultures, and may go back to "prehistoric times", the term vampire was not popularized until the early 18th century.
Count Dracula is the title character and primary antagonist of Bram Stoker's 1897 Gothic horror novel Dracula. He is considered to be both the prototypical and the archetypical vampire in subsequent works of fiction.