NOT Hermedic, but as a nose/mouth covering, it does the job
I bought 2 of similar designs: The cotton of this one is quite a bit softer!  It is fairly comfortable...2 ply. It's washable. Adjustable? Not as easy as another one I bought that has the slide adjuster, but the elastic can be worked/adjusted if necessary.  And let's face it... I didn't have to [try to] make it!  It fits like the other one, so no complaints.<br />UPDATE:<br />I just wore this for an extended amount of time for the first time two days ago. My ears still hurt!  The elastic is fairly skinny so if it's tight enough to fit, it will cut into your ear.  I normally wear another one. I will be keeping this one ONLY as a back up.
Rating: 5 stars