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.

The product inhappy customer n on the Facebook… The product information on the Facebook page was accurate and NOT misleading. The price is very reasonable, I decided to try the product due to the write up on FB and I am more than happy with it. It arrived in a couple of days and is exactly what was advertised and it works

A potentially good idea! In principle the "idea" was great until I attempted to fit over mask...but it kept slipping off..so should it be made of a more "bandage quality" material , impregnated with a "grippy edge" , so that it stays on the mask and protects your face.As it stands I found it costly and ineffective...try again "Snugz mask liners"

I tried multiple times to make snugs… I tried multiple times to make snugs work. Each time the noise of the air leaks from the snugs, every time I breath, kept me and my wife awake. The instructions said to expect leaks but the sound of me breathing was just too much. I feel like I’m not getting the full benefits of the CPAP and oxygen I need. Plus $30 for two circular pieces of material seem high when they don’t work for me

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.