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.
This product is a single cushion in the selected size. This product does not include the elbow, frame or headgear.