The AirFit F20 Cushion is ResMed's replacement full face cushion for the AirFit F20 Full Face Mask and the AirFit F20 For Her Full Face Mask. This cushion covers both the nose and mouth during CPAP therapy. This ResMed AirFit full face mask silicone cushion for mouth and nose coverage has an InfinitySeal cushion, designed to stay sealed at any airflow pressure setting.