This investigation is designed to evaluate the performance (leak and comfort) as well as participant's overall acceptance of the Jupiter mask amongst OSA participants. A total number of up to 15 OSA participants who currently use full face masks will be recruited for the trial. The participants will be recruited from the Fisher and Paykel Healthcare Database of subjects with OSA (Ethics reference NTY/08/06/064), Auckland District Health Board (ADHB), or WellSleep Centre (Bowen Hospital, Wellington, NZ).