A filter mask, designed to assist breathing.
A Filter Mask is a filter set, which allows an individual to breathe a normal density but tainted atmosphere. It uses chemical cartridges specific to a type of tainted atmosphere, and which usually need to be replaced after about ten hours of use at a cost of Cr20 and mass of 0.3 kg.
These masks are also used to filter out airborne military toxins of the same TL as the filter cartridge. The lower TL models are not well designed and interfere with vision and hearing, but higher TL models do not suffer the same problems.