ResMed Mirage Quattro Full Face MaskThe Mirage Quattro is ResMeds fourth generation full face mask that fits over 95% of users. The Quattro features an intuitive MicroFit dial, which provides personalized fit and enhances seal without overtightening the headgear. ResMeds patented Mirage dual wall cushion provides a stable, secure seal while the cushions spring air technology accommodates movement during sleep and allows the mask to sit comfortably on the face. The moving membrane adapts