There are various kinds of masks available for sleep apnoea – pillow, nasal and full face masks. A nasal mask applies pressure only to the nose; a full face mask to the nose and mouth; and a pillow mask only creates a seal on your nostrils.
The type of mask that is right for you depends on how you breathe (nose, mouth, or nose/mouth combined), the shape of your face and the pressure required for your therapy (high or low). Other factors that may influence your choice include comfort, ease of fitting, quietness and ease of maintenance.
Regardless of the mask you choose, it needs to be fitted to ensure it follows the shape of your face and forms a good seal. This prevents air leaks and maintains the proper level of air pressure without making you feel uncomfortable while you sleep.