P.E.S.

The P.E.S. (Pressurized External Suit) is a piece of equipment on the zombies map Moon. It gives players the ability to survive in majority of places on the Moon. The helmet is in the equipment slot and is therefore removable. The P.E.S. is free right after teleporting to the Moon, as it is right in front of the player. The suit is free to take, meaning it can easily be transferred between itself and the Hacker. It is also available in many doorways throughout the map, especially those which lead into areas where the player would need the P.E.S. Without the P.E.S. the player only has 15 seconds to live in a low-gravity area. However, if the player trades it for the Hacker, it may be difficult to get back to the suit again. A common misconception is that Claymores will replace the suit, when in fact Claymores take up the right D-pad instead of the top D-pad.

Trivia

 * When putting the helmet on in first person, it looks exactly the same as the Gas Mask that Hudson puts on in Rebirth, despite the helmet looking different in third person.
 * While wearing the P.E.S., the player is unaffected by the Phasing Zombie' gas, but will still be affected by the explosion of the Phasing Zombie.
 * The player can recieve infinite suits from one location, despite only one being seen.
 * If you enter an area with no oxygen the suit says: "Please activate P.E.S." After you put the suit on it says: "P.E.S. active."