Masks play a critical role in CPAP and BiPAP therapy as these machines send pressurized air to the user through the mask. An appropriate and well-fitting mask can be beneficial in facilitating effective therapy and ease in wearing it. There are various types of masks to suit different preferences, sleeping postures and breathing requirements. There are various types of masks available such as nasal masks, nasal pillow masks and full face masks. Nasal masks are used to cover the nose and nasal pillow masks are used for a lighter fit with pillows around the nostrils. Full-face masks are meant to cover the face and nose and can be used if an individual breathes through their mouth while sleeping. When choosing masks, look for comfort, fit, seal, adjustability and compatibility with your CPAP or BiPAP machine. Routine cleaning and timely replacement of mask components can also aid in maintaining hygiene and performance of the mask. This can be done with the assistance of a healthcare professional or respiratory equipment provider who can help you select the appropriate one.