This cushion is for full face masks only. It will not work with any nasal mask. It will work only with that sized Full Face Resmed Mask.

Either the Small Shallow or Small Standard cushions can be used on the original Small Mirage Full Face Mask, the Small Shallow or Small Standard Series 2 Mirage Full Face Masks, and the Small Shallow or Small Standard Ultra Mirage Full Face Mask.

Either the Medium Shallow or Medium Standard cushion can be used as a replacement on the original Medium Mirage Full Face Mask, the Medium Shallow and Medium Standard Series 2 Mirage Full Face Masks, or the Medium Shallow and Medium Standard Ultra Mirage Full Face Mask.

Either the Large Shallow or Large Standard cushion can be used as a replacement on the original Large Mirage Full Face Mask, the Large Standard or Shallow Series 2 Mirage Full Face Masks, or the Large Standard or Shallow Ultra Mirage Full Face Mask.

Shallow denotes a smaller cutout in the top of the cushion for the bridge of the nose. People with significant bridges should choose the Standard instead of the Shallow. This cushion is for full face masks only.

Remember that a small cushion fits on small masks, medium on medium masks, and large on large masks. Each frame has a specific size so mixing cushions will not work as it does on Resmed nasal masks.