ResMed AirSense 11 Hypoallergenic Filters, 12 per pack

Filters exclusively for AirSense 11 series. CPAP filters help safely remove environmental particulates like dirt, dust and contaminants like allergens, or bacteria so you can enjoy clean air during therapy. Filters should be changed at regular intervals of every month to ensure therapy air is filtered. Change frequently if you have house pets. 

Hypoallergenic filters are ultra-fine to provide additional filtration from airborne allergens. Recommended for users suffering from allergies.