"Simplus Full Face Mask offers unique features that will benefit users. The face mask affords an easy, quick and comfortable fit thanks to its multiple point adjustment. This feature makes customised fit easy to do and maintain. The product is available in three sizes to provide CPAP mask users a lightweight option. Features: • The RollFit Seal rolls back and forth on the nose, auto-adjusting during sleep to reduce pressure on hard to fit areas, like the bridge of the nose, while increasing overall seal and comfort • Made up of two parts -- a silicone seal and an acrylic shell. The two parts CANNOT be separated"