The FlexiFit 431 is very comfortable to wear but terrible to use!! It has been made cheaply and has no anti-suffocation valve - the FlexiFit instead has a non-return valve in the elbow, this means that when you exhale you have to FORCE the air out the exhaust vents and this means you are exhaling ag...

The FlexiFit 431 is very comfortable to wear but terrible to use!! It has been made cheaply and has no anti-suffocation valve - the FlexiFit instead has a non-return valve in the elbow, this means that when you exhale you have to FORCE the air out the exhaust vents and this means you are exhaling ag...

The Flexifit is very comfortable to wear but it is terrible to use! It has been made cheaply and has no anti-suffacation valve - the ResMed Full Face does have one - the FlexiFit instead has a non-return valve in the elbow, this means that when you exhale you have to FORCE the air out the exhaust ve...

I have tried both and the Flexifit is very comfortable but is also very hard to exhale into - the Resmed leaks on both sides near my mouth when the pressure goes over about 11 and the noise this makes is worse than snoring!! I have tried tightening the straps with little effect. I am thinking of mod...

I have tried one of the Flexifit 431's and also a Resmed Mirage Full Face Masks. I find that the Flexifit is very difficult to exhale thru even at low pressures - although it is very comfortable and doesn't leak. The problem I have with the Resmed is it leaks at the sides when the pressure is high -...