This is the replacement headgear for the AirFit F30i. All it takes is two simple snaps of the magnetic clips and your mask is on or off. The soft headgear has been designed with a comforable sleep experience in mind, it has four areas of adjustment to ensure an accurate first time fit. It comes in a one size fits all style for ease of use. AirFit F30i headgear maintains an open field of vision to read, watch TV, or wear glasses in bed. The minimal-contact mask is designed to help you feel less claustrophobic during therapy and to reduce facial markings.