NBC Gas Mask Filter, CBRN 40mm Gas Mask Filters for Gas Mask, Single 40mm Activated Carbon Filter for Chemicals, Vapors, Gases, Dust, Industry, 20-Year Shelf Life

Worked exactly as expected and was a great match for my first gas mask. If I need more in the future I’ll definitely buy this one again.

great filters. Will buy again. fit great. no unusual smells. filtered out all contaminants

Just bought for emergencies. Seems sturdy and of good quality. Fast shipping.

if it does what it says it’d protect you from bad karma. says you can use it in 17% O2 enviro and is good for high carbon monoxide enviro. smoke, chemical and radiological and bacteria! 20 year shelf life but didn’t see a production date. it’s heavy in the right way . proly a good deal

Now I have them if needed. Excellent find and cost with speedy delivery.

Durabilty is great. Long shelf life. Air flow is wonderful and the value for what I paid for I’m 10/10 satisfied with my purchase will buy more

Thank you-save my life.

This item is questionable, it's made in china. I hope that it really works when I need it