Replacement Cushion Compatible with F20 (Medium) AirFit AirTouch CPAP Mask, Premium and Snug Fit, Soft and Durable Material Made of High Grade Liquid Silicone, Latex Free, Snaps in Place and Prevents Slipping and Leaking, Covers Nose and Mouth, Size Medium. Our Medium F20 Replacement Cushion has a premium and snug fit to prevent leaks while staying comfortable. The high grade liquid silicon full face cushion covers your nose and mouth to prevent dry mouth, brain fog, mouth breathing, and lack of energy. Our cushion is only compatible with F20 AirFit and AirTouch CPAP masks and to be used with other original parts of the F20 Air Touch or Air Fit mask. It is highly recommended to replace it every 1 to 2 months for optimal performance.