These replacement full face cushions are designed for use with all ResMed Ultra Mirage Full Face and Mirage Series 2 CPAP Masks. Shallow cushions have a narrower opening towards the bridge of the nose and may be a better fit for people with flatter noses and nasal bridges. Cushion Clips are sold separately below. These cushions will NOT work with Ultra Mirage Nasal masks or Mirage Quattro Full Face masks.