Thank you, but I'm afraid of leak while sleeping. In my case I wear the stringh at half measure on small size mask and so I think is right (maybe)

Greetings to all users, I started using the CPAP about a year ago and undoubtedly the quality of my sleep and oxygenation has improved, but the mask worn every night (I have a Resmed Full Face Mask Airfit F20) is creating both compression wrinkles on both sides of my nose up to my mouth on both side...