The Mirage Quattro™ is an innovative design featuring an advanced seal which adjusts for a better fit. The MicroFit dial allows the mask forehead support to be adapted to the user. It features several areas of adjustment to provide the most comfortable fit and seal possible. A full face mask is a great solution for those with frequent nasal congestion and can be useful to have on hand in the event of a cold or bothersome allergies. This is a full face mask which covers the entire nose and mouth.