Chin drops, mask leaks

Full mask. His chin sags/drops in his sleep, and when it does the mask starts leaking. I looked at chin straps, but they are for nose masks, not full masks. I am waking up several times a night to the noise of the leaking mask, finding him with his cheeks bulging from the extra air pressure triggered by the leaking. Any ideas about soultions?

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I have found using a mask filter (soft cloth cover that rests between my mask and skin) has helped a lot with mask leakage, even when my chin drops.

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I too have jaw drop. I’ve run the gamut from nasal pillows to full face hybrid masks to literally a “full face” mask. Cloth covers have certainly helped address leaks though they still occur often enough to wake me several times a night. I’d prefer to use the F20 or the Fisher Paykell full face mask but those cause bruising to the bridge of my nose which even the cloth covers nor the gel pads help. It’s frustrating enough to where I just take off the mask to sleep through the night.

Sure wish the industry could come up with a mask that works for this situation!