P.E.S

The P.E.S [Pressurized External Suit] is a piece of equipment on the Zombies map, Moon. Right after teleporting to the moon, it is in front of the player and is free. It is also available in every Air Lock on the map. Without the P.E.S, the player has only about 15 seconds to survive in an area without oxygen.

Trivia

 * You can still drink Perk-a-Colas while you are wearing the helmet.
 * It does not replace Claymores.