Quietus liners, a CPAP reusable mask liner, offers users the ultimate in comfort while eliminating the vast majority of issues encountered by ongoing use of various CPAP machines. Quietus Liners are an accessory for your CPAP mask. They offer the following benefits: Quality~ A very high quality cotton based fabric is used for maximum comfort, absorption of facial oils and moisture. Once you touch and see a Quietus Liners you can see and feel the quality and comfort. Design~ our high quality knit fabric along with our exclusive and unique design helps the mask conform to both your face and the mask. That helps insure a better fit and fewer air leaks, fewer air leak noises and much greater comfort. Reusable~ our mask liners are good for 3 to 7+ nights use.