The ResMed Mirage ActivaTM LT nasal mask is designed to fit right for an easy night, ensuring that patients enjoy a comfortable, hassle-free night of sleep therapy. With ActiveCell™ technology and quiet, diffused venting, the Mirage Activa LT is engineered with the goal of improving patient compliance. Key features Reliable. Compact ActiveCell technology automatically seals for quick fitting and accommodates therapy pressure changes and patient movement. Comprehensive. The Mirage Activa LT is also designed in a small size to better fit a wider range of patients. Comfortable. Minimal headgear tension promotes long-term comfort and compliance, and the unique design diffuses air quietly and gently away from patients and their partners. Easy to use. The mask?s MicroFit dial fine-tunes the fit to suit each user?s profile with easy, one-handed adjustment.