The cloth masks are not tight and so there is SOME leakage but the numbers are good.

The cloth masks (the only ones I can use) are normally very loose.

I attached some heavy duty Velcro (nylon) and I put on the mask like a catcher's mitt so it is always already sized gor me.

Worn Velcro I cannot use the full-face masks or the silicone ones either. Those feel like a suction cup on my face. I prefer the Circadience Sleepweaver Advance cloth masks. The only issue is that the Velcro seems to stop working (does not stay connected) during the night. Sometimes I wake up in the...