New 3D mask cushion provides an excellent seal without tight headgear, the face pressure sores and discomfort won't happen. Innovative adjustable forehead support provides stability with easy one-handed adjustment and allow the mask fits most of patients. Quiet air vent that minimizes noise and enable efficent CO2 washout; vented air is spread as cloud so that it does not disturb patient or companion. Material: Silicone, PC Size: Small