FILTER CARTRIDGE for protective mask Mongoose

* The filter layer with class F9 fabric is used for the production of protective masks for miner masks and is characterized by a high efficiency of air filtration * F9 is a specialized fiber material with extensive bactericidal and antiviral properties, ecological, non-toxic and safe for the skin. It contains no heavy metals * the filter layer is changeable and can be disinfected. Use time about 100 hours