The Nasal-Aire II from DeVilbiss is one of the most comfortable CPAP interfaces available. The comfort comes from the headgear that has been designed to fit nearly any face with virtually no leakage, preventing eye irritation. Nasal bridge sores are also prevented here since the interface lacks a nasal bridge. Also, the design of the headgear eliminates uncomfortable pressure points on the face for more comfort, even when used for an extended period of time. The Nasal-Aire II’s headgear also lets you sleep in any position due to the secure fit that won’t interrupt airflow. Plus, the nasal prongs are made of ultra-soft material that doesn’t cause discomfort. For more customization options (and thus better comfort), the tubing can be worn behind the ears or down the chest. Comes with 6 different nasal prong sizes: extra small, small, medium, medium plus, large, and extra large. Medium or large size fits 90% of patients.