Unlike traditional masks, the ResMed AirFit F30 Nasal Mask fits under the bridge of the nose, preventing scarring, chafing and irritation, while also reducing the feeling of claustrophobia. The ResMed AirFit F30 Nasal Mask also features the state-of-the-art QuietAir vent, which is as quiet as a quiet room at night. In addition, the magnetic clips make the mask easy to apply. Finally, the one-size headband facilitates the first application for a secure and tight grip. Features: QuietAir air duct creates a quieter bedroom. One size headband fits all mask sizes Soft silicone cushion keeps you comfortable when you sleep on your side Designed to prevent marks and irritation You have a clear field of vision that allows you to wear glasses or watch TV. Quick release magnetic clips.