The ResMed AirFit N30i nasal mask supports your nose and provides the freedom to sleep in your favorite position without the tube getting in your way. 
Head frame is available in Small as well as Standard size whereas the nasal cushion comes in three variants- small, medium, and small wide.

The ResMed AirFitTM N30i has a groundbreaking tube design, which places the tube at the top-of-the-head. 
The air from the CPAP machine is supplied by a SpringFit framework rather than from below. 
Most of the tube is at the back, which allows you to sleep comfortably on your stomach or on either side. 
The top-of-the-head elbow connection can rotate 360o, and gives you even more mobility. 
Now you can watch TV or wear glasses so that you can read a newspaper or your favorite book. 
The low-profile frame and tube design of this mask help to reduce feelings of claustrophobia.