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 areas that are void of oxygen on the Moon, much like a space suit. Without the P.E.S., the player can spend a maximum of 15 seconds in a vacuum before being downed; the player also will not be affected by the Phasing Zombies' gas. The helmet is in the equipment slot and is therefore removable. However, leaving it on has no negative effects other than slightly hampering the player's hearing as it muffles the sounds outside and emits a sound of air being filtered.
The P.E.S. is free to take and is right in front of the player after teleporting to the Moon. It is available in every Air Lock throughout the map. Because the P.E.S. is free, it can easily be transferred between itself and the Hacker. The P.E.S. and the Hacker occupy different equipment slots than Claymores/Trip Mines and therefore will not replace them.
In Black Ops, despite the world model of the suit resembling a typical spacesuit with a round helmet, the first-person view of equipping and unequipping the helmet shares the model of the Hazmat suit in Rebirth, only covering the face. This is corrected in Black Ops III, where the character puts on a helmet that covers their entire head.
- There is no actual reflection of the background on the P.E.S. visor; it only shows a landscape on the moon, no matter where the player is.
- Richtofen will call the device "pies" because "P.E.S." somewhat resembles the word "pies".
- Players can put on the P.E.S. in three different ways. A player can put it on while standing, which is the regular way of putting it on. If crouching the player can notice that they are putting the P.E.S on slightly to the left. When putting the P.E.S on while prone, the player will put it on left.