For CPAP patients who are active sleepers, the ResMed Mirage Activa™ nasal CPAP mask has proven to be a great 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.