Cloak

The Infiltrator's Cloak ability is one that allows him to become nearly invisible at close range and completely invisible at long range. Upon activation, the player touches a button on their arm before becoming near invisible. It is perfect for getting away from enemies or sneaking inside the enemy base.

Damage/Statistics
While the Cloak does no damage it is useful for sneaking up on enemy players. A regular Cloak lasts for 7 seconds while a Cloak with Specter while last for 14 seconds. The Shadow Stalker ability allows you to stay cloaked for an extra second after firing.

Attachments
Cloak Intercooler: Enables Cloak ability resource to refill faster

Specter: Increases the time you're able to stay cloaked

Shadow Stalker: Can remain cloaked for a brief time after attacking

Strategies
Since the Cloak ability makes you completely invisible from long range try using it in combination with the Nucleon Charge Rifle. Also, while sniping, don't use invisilbility whenever it is available, instead try using it only when you see an enemy. Then recloak after you take your first shot. This way they don't know where you are exactly until you fire your second shot instead of your first one.