This is a set of 3 mask liners.
DESCRIPTION
This Liner fits on both the AirFit F30 and the AirFit F30i
All PAD A CHEEK mask liners are designed to prevent contact dermatitis from the cushion of the mask. The mask liner also should help prevent the marks from the mask cushion. The material is moisture wicking to absorb oil and sweat and lengthen the life of the cushion. Many people have told me that they also reduce the leaks, but that is a happy accident. The mask liner wraps securely around the mask and is designed to stay on the mask whenever you remove the mask in the night or in the morning. Typically the hole for your nose is cut smaller than needed. You may want to cut the hole for your nose larger in order to prevent the material from covering the hole too much. The hole in the mask liner is really easy to get too large, so take your time with sharp scissors.
Washable and reusable these mask liners will last over 6 months. The material is very durable and will work well for a long time. The fabric changes slightly in the thickness when you wash it the first time. This mask liner material has been tested for cleaning with the SoClean machine and showed no damage.
This Liner fits: 
AirFit F30i
AirFit F30