Glass-Shield Cloaking System (DXHR)

The Glass-Shield Cloaking System is an augementation in Deus Ex: Human Revolution. The Glass-Shield Cloaking System renders the user invisible for a few seconds by bending light around his person, including lasers such as the ones used in security measures. Though the energy consumption is high, there are upgrades for the cloak that makes lessens the strain on your energy bar. Regardless, in most situations you will only have a few seconds of cloak time, though a prepared player will have plenty of consumables ready to replenish energy for emergencies.

The Glass-Shield Cloaking System is likely to be an early acquisition for a stealthy or pacifist character; it is useful for moving between cover spots, but keep in mind you are only invisible, you still make noise; so you must either install and enable the Run Silently upgrade for the Cybernetic Leg Prosthesis augmentation (which also uses energy), and/or have several full energy bars to take full advantage of the cloak. It should also be noted that bumping into an enemy will disrupt the light-bending effect and will likely result in said enemy going hostile; they still won't be able to see you but they will begin actively looking for you, possibly firing at your last known position.

Even though Adam uncloaks during takedown animations, the game is essentially paused during these sequences and thus you will not be seen while performing the takedown, even if you are in direct line-of-sight of multiple alerted enemies, and you will recloak as soon as the animation completes. They will go on alert immediately after the animation (they'll see the body, obviously) but this can be useful for quickly and covertly eliminating a key enemy while not compromising your own safety. Just remember that you must have a full energy bar to perform the takedown which will be consumed, so for this to be practical you need as many energy upgrades as possible as well as all the cloak upgrades. Hotkeying an energy supplement is also good practice.