Some people want as little mask as possible, and the F&P Brevida keeps contact to a soft AirPillow seal at your nostrils. Its AirPillow seal rests at the edge of your nostrils and gently inflates to hold the seal, so you feel a soft cushion instead of hardware, with a clear view for reading or glasses.
The Luna TravelPAP takes the same idea and applies it to the machine: small, light, quiet for a travel machine, and smart enough to adjust your pressure on its own wherever you sleep.
The Brevida has no magnets, so the FDA precaution about magnetic mask parts near implanted medical devices does not apply. If you have an implanted device, ask your doctor which mask is right for you. Together they make the kind of kit you stop noticing until you realize how well you slept.