|I just read a few reviews that others have wrote... Yes they are indeed NBC Filters but prior to '91 NBC filters contained Hexavalent Chromium which has been found to cause Lung Cancer and a whole boat load of other health problems.. Now with how old those filters are the seals inside could be compromised and you might get a lung full of CR6+.
This mask will accept NEW Production filters with the standard NATO 40mm thread.
Also the mask itself is permeated by modern chemical warfare agents within minutes meaning the gas will pass directly through the rubber and into your skin. New masks are made of specially blended materials that are more resistant.
This mask may be effective against Volcanic ashes, Nuclear Ashes, Biological, (Tear Gas - Which is actually a cloud of fine crystals not gas like the name would suggest)
Basically it will function as a HEPA Filter but is not effective against Gas and the included filter should be for collectable only!
Besides, unless you have a several thousand dollar gas detection device to know when to put on the mask and a chemical suit to go along with it and the drugs you must inject yourself with prior to putting it on and a place to go that is air filtered to decontaminate you wouldn't survive a chemical warfare attack anyways most of the chemical agents will kill you if it even comes in contact with your skin.|