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.

You issued my refund quickly. You issued my refund quickly, I mean faster than most. This tells me you are mindful of my needs and respect them. Now if you could engineer a cover for all other masks I would buy them without hesitation. Thank you for being part of the solution.

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.

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"

Although the purchasing was easy and… Although the purchasing was easy and delivery was timely I have given a 3 star rating because I think the actual product is quite average. It is soft and feels great against the skin, I have a nasal mask, but I have not been able to use it as an hour or two into sleeping it becomes very noisy and the sound wakes me and my husband. The cover would be better if it was about an inch longer so it could then fit on my mask the way it is supposed to. At the current length I cannot get it to tuck over the way it should.