Resmed's QuietAir Elbow for AirFit F30, AirFit F20 & AirTouch F20 provides almost silent air dispersal, and a more gentle exhaust airflow than ever before, so everyone can enjoy a quiet, comfortable night's sleep. The QuietAir Elbow also features quick release squeeze-tabs so it's easy to detach with one hand at night; and it rotates 360-degrees with an independent tube swivel to reduce sleep therapy tubing drag.