"The ResMed Mirage Quattro™ is the industry standard for CPAP masks. Offering streamlined design and quiet performance, the Mirage Quattro is easy to fit and use, offering a choice of 24 forehead support positions to best suit your individual facial structure. The Spring Air™ cushion technology also accommodates a wide range of movement during sleep and provides an effective solution for jaw drop. Features & Benefits: • MicroFit dial allows users to easily adjust forehead support for personalized fit and comfort • Mirage™ dual-wall cushion with spring air technology accommodates movement during sleep (including jaw drop) • Improved vent design reduces noise by over 50% • Set-and-forget headgear clips and slots save optimal fitting settings and allow for quick headgear removal • First-time fit reduces mask refitting and callbacks • 4 sizes (XS, S, M, L) - new XS size! • Comprehensive user support package included"