the Ultra Compact F30 Full Face Cushion's innovative, minimal contact design sits below the nose -covering just the mouth and the nostrils - to reduce contact with the face and eliminate problematic touch-points like the nasal bridge and upper cheeks. The low profile design helps reduce the pinching and red marks common to many full face mask designs; but it's also perfect for people who wear glasses or like to read at night. It can even help reduce feelings of claustrophobia.