Stalcraft Wiki: MIS-116 Emerald

In-game description (EXBO)

One of Research Institute 7's research suits, nicknamed "foil" by stalkers. Increased protection against biological threats and chemical exposure is beneficial in the Zone, not only for researching various anomalies, but also when inspecting the abandoned chemical and industrial facilities that remain in the CEZ.

Quoted from the game's own text in EXBO's public game data. Not written by STALCRAFT Meta.