Battlefield filter

Deployed troops confronted or threatened with dispersed chemical or biological agents need both personal protective gear and collective protective shelters that will mitigate agent effects to the extent feasible. Personal protective gear may include respiratory masks and controlled-pemieability suits, boots and gloves. Collective protection may be afforded by air-locked and sealed temporary battlefield shelters with filtered air supplies, as well as by more permanent... 

In contrast to the civihan situation, the military have traditionally taken a different approach to PPE since carbon monoxide is not usually a battlefield hazard and self-contained breathing apparatus is not easily deployed in the field. Thus, military PPE uses relatively hghtweight suits with filtration respirators where ambient air is filtered through a cartridge containing activated charcoal mixed with... 

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