The ResMed AirTouch F20 cushion replacement can be used in place of the silicone cushion of the AirFit F20 face mask. Made of UltraSoft™ memory foam, this cushion conforms to the unique contours of each face for a truly personalized fit. The AirTouch F20 Cushion is intended to be swapped out every 30 days and simply wiped after each use.