The study will evaluate the subjective seal, comfort, stability, usability, and humidification performance of the prototype mask systems in CPAP established patients. The performance of the prototype Menai mask systems (full face, nasal, and pillows variants) will be subjectively assessed through user questionnaires based on an 11-point Likert scale, and will be compared against Comparison masks.~The prototype masks share the same parts (cushion, frame, headgear), with the difference being that the Menai masks feature a novel vent and humidification system.
The primary objective of this study is to evaluate the subjective performance of the Menai mask systems (full face, nasal, and pillows variants), compared against Comparison mask systems.