This is the replacement cushion for the AirTouch N20 made from ultra-soft memory foam and can be used with the AirFit N20. Mix & Match The AirTouch N20 memory foam cushion and the AirFit N20 silicone cushion are interchangeable, allowing you to swap between the two as you like. Each size of cushion easily clicks into the same mask frame. Light, Breathable Seal Designed to contour to every unique face for a truly personalized fit across a wide range of patients and sleep therapy pressure levels. No Need Regular Cleaning The cushion should be wiped down with a cloth or CPAP Mask Wipe after each use. For best performance, memory foam cushions should be replaced every 30 days.