Just got this new gasmask, I'm not really familliar with it at all, can anyone tell me if this filter is any good? : r/gasmasks
Modern Military Gas Mask Fp5 Filter 40mm CBRN NBC for Most Models for sale online | eBay
GP-5 gas mask - Wikipedia
Amazon.com: ANHUI Gas Mask Filter NATO Specifications NBC for 40mm Gas Masks CBRN Filter NATO with Longest Shelf Life. 20 Years : Tools & Home Improvement
cass.si — Sundström P3 filter to 40mm NATO adapter