ResMed Mirage Activa LT Nasal Mask with Headgear is designed in a small size to better fit a wider range of patients. Designed to accommodate a wide range of users, the ResMed Mirage Activa™ LT nasal mask is engineered to ensure a comfortable, hassle-free night’s sleep. It’s the only sleep Apnea mask you’ll ever need. You get an amazingly light, quiet and diffused mask for effective, reliable sleep apnea therapy.