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The subject of this article appears in Call of Duty: Modern Warfare III

"Eliminate footstep sounds.
Immune to movement reduction effects.
Bonus Throwing Star and Throwing Knife ammo.
Resupply Throwing Stars and Throwing Knives every 25s.
Duplicate effects do not stack. If equipped with Covert Sneakers or Reinforced Boots, gain the effects of Running Sneakers.
— In-game description

The Ninja Vest is a Vest featured in Call of Duty: Modern Warfare III. It was added as part of the Season Two update.

The Ninja Vest eliminate the player's footstep sound, make them immune to movement reduction effects such as a Stun Grenade, and they be given bonus Shurikens and Throwing Knifes which resupplies every 25 seconds. If the player also has the Covert Sneakers equipped, they gain the effects of the Running Sneakers.

When equipped with the Ninja Vest, the player is still allowed a Tactical, Lethal, Field Upgrade, Boots and Gear.