Feature:1. Clean Hygienic: Using our unique replacement filters ensures that you can breathe clean, hygienic air while using the breathing machine, making your life more comfortable.2. Suggestion: You had better replace the filter every 18 days, so that you can keep your breathing clean and hygienic in time, without too much dirt on it.3. Sleep: After you use our supply filter, you can enjoy a quiet sleep and create a peaceful environment for your family, I believe you will be satisfied with the filter.4. Scope Of Application: Our breathing machine accessory is suitable for ResMed Airsense 10, for Aircurve10, for Airstart 10, for ResMed S9 series standard breathing machine.5. Quantity: Our disposable filters have a total of 20 pieces, which are large in number. Once used and played, they will be thrown away once, which is enough to use for one year.Specification:Item Type: Replacement filters for ResMed Material: CottonScope Of Application: Suitable for ResMed Airsense10, for Aircurve10, for Airstart 10, for ResMed S9 series standard machines.Package List:20 xReplacement Filters