Very poor quality! Do not buy!
These filters are pieces of junks and they fail very quickly by creating super loud noise!!!<br /><br />I bought these filters for my Philips CPAP machine. At first sight, I found them in different sizes and texture compared to my original ones, but I didn't take it seriously. While during the first two nights they worked just fine, both my wife and I were woken up around 3:00 am the third night by a very loud noise made by my CPAP. It was just like someone is snoring heavily right next to me! The next morning, I tested multiple times and found the noise was actually due to the failure of the so-called "ultrafine" filter. While it should be soft, but now felt just like a piece of very hard & rough paper!<br /><br />I thought this was just a coincidence, so I replaced another new ultrafine filter. Guess what?! Three days later, it failed again by waking me up in the middle of the night!!! The CPAP was to help me improve my sleep condition, but with these poor-quality filters, it has made my sleep much worse!!!<br /><br />This is completely ridiculous since my original ultrafine filters would last for a month. I am very annoyed by these filters and wouldn't reorder them again! I would recommend anyone AGAINST buying these junks!!!
Rating: 1 stars