For all Full Face that reach to the chin (reach below lower jaw / fit over the chin ). These masks are: FlexiFit HC431- FlexiFit HC432- Forma Full Face - Hans Rudolph 7600 -Series V2
Comes in 2 Sizes: Large and Small.
Large and Medium sized Chin Full Face mask need Large Gel Liner.
Small sized Chin Full Face mask needs Small Gel Liner.
Chin Full Face Gel Liner is 1/4" thick and is designed with a specific padding that:
1- Prevents the gel liner from moving during sleep by locking the liner inside the mask edges.
2- Closes the gap next to the nose which is a common place for CPAP leak from upper half of the full face mask.
3- Closes the gap around the creases of upper and lower lip juncture, which is a common place for CPAP leak from lower half of the full face mask especially for people who tend to open their mouth during sleep which causes masks to move and break its seal starting to leak from lower half.