I have a full face mask and while it… I have a full face mask and while it did stop the noisy air leaks, a side affect of breathing through my mouth all night with the leak was that my gums seemed to dehydrate and cause a lot of pain in my teeth. I gave up on the third night, too painful

Not worth the pain Though they do keep the fart noise from sounding when the mask moves, in order to still keep the mask from leaking, you pretty much have to lay in a way that the mask can't move. (Tightening the straps)This mask liner has caused deeper marks on my nose and has caused enough pain that I have had to remove it in order to use my machine. I would recommend purchasing mask liners from the mask supply company you use instead.

I really wanted to give more stars and… I really wanted to give more stars and maybe this would work with bigger masks… I have just a nasal mask and this liner bunched up underneath and filled my mask making it hard to breathe. I tried adjusting it but there was just too much material.

Bought to reduce red lines from a full… Bought to reduce red lines from a full face mask. Still have the red lines

Difficult to get it to fit right We could not get the fabric to fit on our masks in a way that made it comfortable and prevented leaks . The fabric seemed too stiff and my husband’s large face mask just folded in weird. My smaller mask seem to fit better but leaked around the edges which kept me awake.