The investigation is a prospective non-blinded and semi-randomized investigation. The investigation is designed to assess the alternative sizing model which the trial mask concept is based on and how it compares to a conventional sizing present in the Prototype Full Face Mask (PFFM) mask. A cohort of up to 38 pre-determined current nasal and full face mask users will be recruited by Fisher & Paykel Healthcare in Auckland New Zealand, Waikato DHB in Hamilton New Zealand, Hawkes Bay DHB in Hastings New Zealand and WellSleep Centre in Wellington New Zealand.~The study will involve baseline (visit one) gathering the participants' prescribed PAP therapy pressure and their usual mask (to have up-to-date records). The next visit (visit 2) 7 ± 4 days after visit 1, the participants will be fit the Prototype Full Face Mask (PFFM) mask or the alternative sizing based trial mask. At visit 3, which will be after 7 ± 4 days from visit 2, the participants will be crossed over to the mask. At visit 4, 7 ± 4 days after visit 3, all masks and devices will be collected from the participants.
The investigation is a prospective non-blinded and semi-randomized clinical investigation. The investigation is designed to assess the alternative sizing model which the trial mask concept is based on and how it compares to a conventional sizing present in the Prototype Full Face Mask (PFFM) mask.