Pull the frame and headgear over your head until the elbow is positioned on top of your head. Place the cushion under your nose, and then adjust the headgear as necessary. To connect the tubing, pinch the side buttons on the quick-release elbow to remove it from the mask. Insert the tubing and reconnect the elbow to the mask. The quick-release elbow makes it easy to disconnect the mask from the tubing if you need to get up at night.