The disposable Hypoallergenic Filters are designed to prevent debris and other particles from entering your device.
These are available in a 2 pack. They are compatible with any S9 device and AirSense 10 devices.
They should be changed regularly, around every 1-2 months.
ALWAYS READ THE LABEL AND FOLLOW THE INSTRUCTIONS FOR USE. IF SYMPTOMS PERSIST, TALK TO YOUR HEALTHCARE PROFESSIONAL.