Candace, I have absolutely no problem keeping my mouth closed (at least while sleeping - I have trouble keeping my mouth shut during the day )

My leaking problem stems from the silicone seal not setting properly on my skin. In order to have it seal right, I have to tighten the straps sooooo veerrrryyyy tight on the full face and nasal masks. that puts pressure on my sinuses that are along the cheek bones, and hurts. You should see me in the morning after tigtening -- bright red welts across my face that take at least 4 hours to go away. Loosen the straps so they don't hurt? I have leaks

Nasal pillows actually seal really well for me (YAY!), and the straps can be left a lot looser so they're comfy (YAY! YAY!). I am just having the hardest time finding ones that fit my nostril at the right angle so as to not hit my scar tissue. The new one I tried last night sealed pretty well, was comfortable in my nose, fell at a food angle, but left nice big welts on my cheeks from the straps, which is unusual for a nasal pillow *Sigh*

I swore this was going to be easy. Hubby got his mask, put it, on went to sleep, and life was good. The doctor said 90% of people have no trouble and keep the first mask. The other 10% are like me -- lots of trial and error. and if not for the scar tissue, I'd have found the right mask a onth ago