Many Full Face CPAP mask users encounter skin irritation, sweating, and leaks from with their masks. The RemZzz CPAP mask liner design helps to prevent moisture by the natural fiber material allowing moisture to wick away. The reduction in moisture reduces skin irritation and mask leaks. The liner material also prevents the cushion from slipping and absorbs facial oils which tend to loosen the mask seal. Each 6-Day Kit comes with 6 RemZzzs mask liners and 1 forehead liners. Use the forehead liner if you are experiencing red marks from you mask's forehead support. RemZzz created liners to fit the most popular CPAP masks. The RemZzz CPAP mask liner comes in Small, Medium, or Large sizes for several of the top manufactured masks on the market. Each order comes with a 30-day supply of RemZzz liners specific to your size mask.