Stalcraft Wiki: MIS-105 Topaz

In-game description (EXBO)

Scientific suit manufactured by Research Institute 7, designed for work in anomalous zones with high temperatures. One of the early prototypes of equipment from the research institute, intended to protect against specific anomalous threats. Despite being tailored for particular tasks, many stalkers consider such suits a decent solution, at least for the early period.

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