Snugz Mask Liners a must. In the 9 years of CPAP use I have never… In the 9 years of CPAP use I have never had a night when I wasn't awakened to that darn mask burping 4 - 5 times a night and then lay there trying to get back to sleep. With the Snugz liner on my mask I am sleeping steady for 6 - 7 hours with no interruptions. Absolutely a must for anyone using CPAP.

The mask is a great idea but… The mask is a great idea but unfortunately, using the liner distorted the shape of the membrane that creates a seal on the face. The result was a unacceptably high level of air leakage even at relatively low levels of air pressure. It may work more effectively with other mask designs but not for AirFit F20 size M. YMMV.

Sure makes the mask more comfortable… Sure makes the mask more comfortable and no leakage! Was having so much trouble with leakage around my eyes! Just had cataract surgery and was very irritated. This solved the problem completely.

I am always skeptical of getting… I am always skeptical of getting anything off the Internet. It tends not to be what it supposed to be. So I got tired of feeling air leaking out and hit my eye. So I thought always try it one more time. It got rid of all the leakage to where I sleep better, I definitely recommend it

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.