12 Packs Universal Filters Fit in-Line Filter,Filtered Air Connector Compatible with Dreamstation,Fits All 22mm 25mm Heating Tube Machine

The filters work great. I thought they would impede air flow but I was wrong. I will order more filters as needed.

Although we keep a very clean house, it is obvious how good this product is when you compare a new one to an older one (say 3 weeks or so). The older one has a grey tint due to the microscopic dust in the air. I use a flashlight at night to see if we have dust in our air. We don't since I have re-sealed the HVAC vents. There is still some dust in the carpets , etc. but not in our lungs when we are sleeping. Order these and change them on an as needed basis.

Product works as advertised

These seem ok, but not necessarily great. The initial filter catches most of the dirt in the air. I bought these as “insurance” since my machine was recalled, and there’s a risk of internal foam breaking up and coming out. So I suppose these give me some peace of mind.

I used these on my bipap machine and they filter the air I am breathing and makes a big difference, I would order them again

Great for filtering pollens and micro dust.

I have an air resmed machine. It made it hard to breathe. The filter is really thick and I couldn’t keep the cpap on.

good additional filter for my bi pap, I will buy again

I was one of the guys that had a CPAP machine with the black insulation that would kill you. I was able to find a new insulation kit on Amazon so I changed it out, but when I found these filters just gives you an added feeling of protection, you can see any dust, that is coming in to your mask, but it stops at the filter change once a week or so they’re great

These are absolutely amazing. I love using these cause it provides me a extra layer filtered air to breathe. At my CPAP supplier, they charge $25 for one filter for the same kind of filter so when I saw these here on Amazon for that low price and also a 12 pack I can get 12 for pretty much the same price of 1 of them