The ResMed AirFit™ N20 Nasal CPAP Mask With Headgear conforms to your face and the innovative InfinitySeal enhances your comfort and fit while reducing mask leaks. 
ResMed AirFit N20 Features and Benefits:
Reliable Seal for 99% of Face Shapes
Soft, Flexible Frame With Unobstructed View
New Hose Connection
Magnetic Mask Clips and Quick-Release Elbow 
Headgear / Frame Sizes: 
One Size Fits Most