After about 50 minutes it leaks and I remove it the last 2 nights. As there was not a small headgear available I received a Standard, which is pretty large for me. Tonight I I’ll try a smaller headgear from another mask and see if I can get it to set without leaking. Some air comes up from the mask to my eyes and it doesn’t seem to be from a leak. Will try again this full face mask as I want so to stop taping my mouth widen I use the N30’. I live in hope!!!