30 Pcs Activated Carbon Face Filters Anti Dust Replacements Parts for Most Sport Bicycle Cycling Mask Filters with 8 Exhaust Breathing Valves Replacement

I wear 1 inside an N 95 paper mask. without the expiration valve. so I just tape the punch out mask circles in place on the outside of the mask surface and pin it to the inside of my N 95. I am very sensitive to smoke and fragrances so this carbon insert is very important when I go out to a store or church etc with fragrance or smoke or dust.

These were a perfect fit for my RZ mask. Its a good amount for the price. They last a long time for me because they rarely get used when I forget my mask on my desk and im too last to go back into the house to get it. Now if they can just find a way to make them work while im in my shop running my tools and the mask is in yhe house sitting on my desk.

Works well good fit

They work very well and fit my masks perfectly.

I like that they have a grey color inside so being a woman wearing makeup the filter doesn’t look dirty.

I had purchased a mask from Amazon during the pandemic which require these inserts to be replaced along with the vents from time to time. Even though we are now at better times I still use this mask not only for when I am having to visit a doctors office or hospital to prevent catching anything but I also use these for my greenhouse work. The amounts of dirt dust that can end up plaguing my breathing and sinuses is sometimes ridiculous and can end up in sinus issues. But these replacements are exactly what I need to be able to keep using my mask without worry. With the frequency I need to replace due to how dirty they get I do not run into the problems some have of them starting to fray inside. If they do I simply replace and they are good for another week. Again I use these very often so the fraying occurs more frequently for me I believe due to how much I am using them otherwise the second one I have that I simply use for “sick” purposes lasts a lot longer. Easy to install. Very comfortable on the face, even with sensitive skin.

Does not fit the rz brand dust mask definitely disappointed it seems to fit the other brands of masks sold on Amazon but not the rz brand

Fits nicely in my mask. Works great