This cushion is compatibleONLYwith the following ResMed full face:
Quattro Air Full Face with Headgear
Quattro Air For Her Full Face with Headgear
AirFit F10 Full Face
AirFit F10 For HerFull Face with Headgear
Frame and Cushion Size Compatibility:This cushion is available in size X-Small, Small, Medium and Large. All size cushions do NOT fit on all size frames.
ResMed Quattro Air and Quattro Air For Her: The Quattro Air frame comes in four sizes: XS; S; M; L. The cushion and frame of the Quattro Air must be the same size. For example, a size small cushion can be used only with a size small frame. Frame and cushion sizes cannot be mixed and matched.
ResMed AirFit F10 and AirFit F10 For Her:There are two frame sizes for the AirFit F10: size XS/S and size M/L. Size extra small and small AirFit F10 cushions fit on the XS/S frame. Size medium and large AirFit F10 cushions fit on the M/L frame. A size small cushion isNOTcompatible with a size M/L frame and vice versa.