For FitLife Total face mask: a mask that cover the eyes, nose and mouth.
Comes in 2 Sizes: Large and Small.
Large size Total face mask needs Large Gel Liner.
Small size Total Face mask needs Small Gel Liner.
There are 2 thicknesses for Total Face Gel Liner:
1/4" Thick: is lighter and effective on small gaps between face and mask.
3/8" Thick: is heavier but effective on larger gaps between face and mask.
Designed with a specific padding that is facing the mask, which prevents the gel liner from moving during sleep by locking the liner inside the mask edges.