The AirFit N20 was designed to be so easy to put on and use that you don’t necessarily need specific fitting instructions or “rules.” The secret is in the simple, modular design and magnetic clips, which guide the mask’s headgear to its frame quickly and easily. With this mask ResMed introduces InfinitySeal™ cushion technology. It’s the secret behind the AirFit N20’s remarkable fit range (99% of patients1) and the most adaptive silicone cushion ever designed. It also features specially-designed loops and varying thickness levels designed to prevent blowout, in order to create a secure seal and prevent mask leaks.