For CPAP patients who are active sleepers, the ResMed Mirage™ Activa nasal CPAP mask has proven to be an excellent choice. This mask is also great for any CPAP or BiPAP users who have pressures higher than 12cm/H2O. The Mirage™ Activa Nasal CPAP Mask uses ActiveCell Technology to automatically adapt to the changing positions of active sleepers. It allows the mask frame to move independently of the cushion, which helps the cushion stay in place and maintain a seal during movement at night. The 4 point headgear and the quick release elbow makes this a perfect CPAP mask for those who frequently get up at night. For proper fitting of this mask, tighten forehead headgear straps and leave lower headgear straps loose. After adjusting the headgear, the pressure from your machine will "inflate" the ActiveCell Technology Mask cushion providing an excellent seal. ResMed remains the leader in CPAP mask and CPAP interface development. They always apply patient input to every one of their CPAP Mask designs. * This mask is only effective when used in conjunction with a CPAP/BiLevel machine Includes: Mask Headgear Cushion Cushion Clip Forehead Pad Inlet Tube with Swivel Assembly Materials: Frame: Polycarbonate Elbow: Polycarbonate Vent: Silicone Elastomer Cushion Clip: Polyester Headgear Clip: Polyester Forehead T-Bar: Polycarbonate Short Tube: Polyolefin Plastomer (POP), SEBS Based Thermoplastic Elastomer Swivel Assembly: Polycarbonate/Polypropylene Ports Cap: Silicone Elastomer Cushion: Silicone Elastomer Forehead Pads: Silicone Elastomer Cloth Label: Rayon Acetate Satin Headgear Assembly: Open cell Polyurethane, Nylon/Spandex, Polycaproloactam, Rayon Acetate Satin