With the InfinitySeal design, the AirFit F20 adapts to the unique facial contours of each patient, so you can be sure of providing a secure and comfortable fit. And thanks to auxiliary inner loops, patients can re-adjust their mask, even as they receive therapy, while maintaining the cushion’s form and function to deliver an optimum seal.

To ensure their mask continues to deliver high-quality therapy, we recommend that patients replace their silicone cushion every 1 month, their mask tubing every 3 months and their headgear every 6 months.

When sizing your patients on an AirFit20 series mask, please use our new sizing guides, that have been specially designed for each mask in our series. The sizing tool is in every mask system pack. 


Your type of breathing can affect your CPAP therapy. So, choosing the right mask to match how you breathe while sleeping is important. For example, if you’re a mouth breather, we recommend a full face mask, because therapy on a nasal mask will be less effective and less comfortable.

You can print our sizing guide – specifically developed to help you determine which mask size is best for you. For additional tips, see our sizing video.

Different masks have different cleaning requirements. For videos and guides relating to your mask’s specific cleaning and maintenance needs, see our support page.