1st Choice Reusable Foam Filters...

“Filters are critical components in keeping a sleep equipment unit running longer and more efficiently. A filter captures a wide assortment of dust, pollen and contaminated air particles. These small dust particles, if not captured by effective filters, will accumulate inside the machine and eventually work there way to the airway of the user.
Benefits of Changing Your Foam Filter：

• Changing your foam filter consistently could make an incredibly positive impact on your sleep.

• A clean air filter is important for your health, as well as improving and extending the quality of your machine.

• Using foam filter will allow your machine to last for many more years of effective use, and you will save money in the long-term.

Feature:
Resuable
Filtering large particles in air
Extend the machine life


Compatible Machine
All M Series
All PR System One Series


Recommended replacement interval:
2 weeks
If you are in a particularly dirty or dusty environment,
you may choose to replace your filters more often.“
Is Discontinued By Manufacturer ‏ : ‎ No
Package Dimensions ‏ : ‎ 6.3 x 5.4 x 1.6 inches; 0.81 ounces
Item model number ‏ : ‎ No Model
Date First Available ‏ : ‎ February 12, 2013
Manufacturer ‏ : ‎ Generic
ASIN ‏ : ‎ B00BEWGTGW

[Filter Size] — 1.73 ”long x 1”high 0.4”wide.
[Compatible With Many Respironics (TM) Models] — Fits all respironics M series, PR system one series machine! Each foam filter fits precisely to your machine.
[Value 12 Pack] — A package containing 12 reusable black foam filters. Multiple foam filter packages to meet your replacement needs.Recommended to change every two weeks.
[Cleaning Function] – This reusable foam filter helps capture airborne dust, fibers, lint and pet hair to stop large particulate matter.
[Multi-filter] — This reusable foam filters helps dust, dirt and grime get into your machine motor while keeping your lungs clean.