CBRN Gas Mask Filter NBC-77 SOF 40mm Thread - 20 Year Shelf Life
The NBC-77 SOF filter canister, in combination with a full-face mask, mouthpiece assembly or PAPR provide reliable protection of air passages against a wide range of harmful and highly toxic substances including all known CBRN agents. Filters are...
Customize your order
on U.S orders
I work as a law enforcement officer in Southern California so being prepared is part of my job. I purchased a set of Mira NBC-77 SOF filters because it’s one of the only true CBRN filters available to the civilian market. They are rated for A2B2E2K2HgSXP3 D R, with a DIN rated 58621 Reactor element. The letters stand for the different classes of contaminants, and the numbers next to it show which concentration of these elements the filter can handle. I attached some pictures that help break this down. The D stands for dust (just means it will filter out dust), and the R stands for reusable. If the filter is used for mercury vapor filtration, it’s only meant to be used for a maximum of 50 hours. If any filter is used with highly toxic substances, it’s only meant for single use. DIN is a European rating agency that specifically tests the Reactor, which is meant to filter out radioactive iodine. I have not used these filters, and hope that they sit in my patrol car for the entire 20-year shelf life untouched. But, if they need to be deployed, I feel much better about having a product that covers everything as opposed to just a few different gases.
20 year expiration!! - Amazon Review
You pay a little more for these gas mask filters, but they last a lot longer and are rated for CBRN protection. Standard filter cartridges last 6 years and cost an average of $55. Over the course of 20 years, I would have spent $150+ to keep them fresh and up to date