Features: Patented UltraSoft memory foam provides a unique comfort experience Modular frame design is interchangeable with AirFit N20 InfinitySeal cushion 3 out of 4 study participants found that it performed very well overall Mask comfort redefined ResMed AirTouch N20 is our first nasal mask to use patented ResMed UltraSoft memory foam cushion technology, which provides a light, breathable fit. In a recent study, 9 out of 10 CPAP users who tried it found the cushion comfortable. Interchangeable with AirFit cushions This mask features a modular frame design that fits both AirFit N20 silicone cushions and AirTouch N20 memory foam cushions. Conveniently switch between the two during fittings or send patients home with both to see which cushion type they prefer. No cleaning with regular replacement The AirTouch N20 memory foam cushion doesn't require cleaning when replaced regularly. Studies show that AirTouch mask cushions are hygienic to use for one month without cleaning. And they didn’t show excessive bacteria for a period of up to eight weeks without cleaning.