Hypoallergenic filter for ResMed S9 and Airsense 10 series of CPAPs and Aircurve VPAPs. Your filter is the first line of defense against allergens such as dust and dander. It is recommended to replace your filter every couple of weeks or as soon as it becomes dirty. 

Size: 2 1⁄4" x 1 3⁄8".

Hypoallergenic air filter made out of Non-woven acrylic and polypropylene fibers with polypropylene carrier.

Recommended Replacement Schedule: Once every 2 weeks.

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