To block even the smallest of particles, the one-pack of Disposable White Fine Filters WITH TAB for Respironics M Series is made of polypropelene and acrylic fibers.
Designed for the Respironics M Series, the filter is disposable and should be changed every month.
I had contacted my CPAP supplies provider and after numerous "holds" and "disconnects", I gave up. I found your site on the internet. No hoops to jump through. No "we'll get back to you". I just placed my order and several days later my filters arrived. I was very satisfied with the product and its prompt delivery. I have yet to hear back from my provider and will continue to order from you.
Thought I was ordering a 6-pack not a single filter. Confusing.
I don't have to change this type filter often, but I like having in on my machine.
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