ResMed masks are designed to be compatible with most ResMed machines. Here’s a list of recommended masks for AirSense 11: Minimalist masks for simplicity lovers: AirFit P10 AirFit N30 AirFit F30 Freedom masks for active sleepers: AirFit P30i AirFit N30i AirFit F30i Versatile Fit masks for reassurance seekers: AirFit N20 AirFit F20 AirTouch F20 AirTouch N20 You must use a mask that is compatible with your device. With a compatible ResMed mask, you will be able to use the correct mask settings and to benefit fully from myAir features for AirSense 11, like mask-specific ‘how-to’ videos.