Customizable and Easy to Use The ResMed Mirage Micro CPAP Mask is incredibly intuitive and very easy to use. The innovative vent port design dramatically reduces noise. The cleverly placed exhalation port rests on the elbow attachment and disperses the air quietly away from you, and your sleep partner. Keeping it Cool with Breathe-o-Prene Headgear ResMed's patented fully adjustable Breathe-O-Prene headgear is standard with the Mirage Micro and comes in three sizes (Small, Medium, Large) for a true custom fit. The Breathe-O-Prene soft fabric wicks away moisture to keep you dry. The Perfect Fusion of Adaptability and Stability As you adjust the 24-setting dial to your needs, the patented dual-wall cushion creates a perfect, comfortable seal, which allows you to wear the mask loosely on your face. This feature reduces pressure points particularly on the bridge of the nose, which leads to a better night's sleep. Whisper Quiet Performance ResMed is known for creating very quiet CPAP masks. The Mirage Micro CPAP Mask is certainly no exception. At 24 decibels, it makes this mask as quiet as they come. With smartly designed exhalation ports, the air is diffused up, and away from you, and your sleep partner.