The ResMed AirFit F20/F30 QuietAir Elbow is a crucial component for the AirFit F20 and F30 full face masks. Its purpose is to minimize noise during use, promoting a serene sleep environment for both the user and their partner. With its specialized venting system, this elbow is an essential accessory for those relying on the AirFit F20/F30 masks. Its easy installation and lasting durability have made it a preferred choice among individuals using PAP therapy.