Sometimes using a CPAP silicone cushion can lead to skin irritation or excessive sweating. The RemZzz CPAP mask liner is designed to help prevent moisture from developing, leading to less skin irritation and fewer mask leaks. The special blend of natural fibers wick away moisture and prevents conditions like cushion 'burping' or 'squealing', two types of cushion leaks that generate noise. The liner prevents the cushion from slipping and absorbs facial oils that would otherwise loosen the cushion 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. 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.