Mask Recommendations

I have now taught two classes using two different masks, and one worked much better than the other.

On Monday, I used the Israeli-made, and very expensive, Sonovia Sonomask, with a patented anti-viral fabric. It fit comfortably with a tight seal, but it was evidently not designed with teaching in mind. Every time I opened my mouth to speak – thus lowering my jaw – the mask pulled down and began slipping off my nose. I had to keep pulling it up, which was obviously a distraction. It probably works well enough for sitting in meetings and audiences, but I recommend against it for teaching.

On Tuesday, I used a KF-94 manufactured by Alliable Medical. The pull-down chin flap fit snugly, and the top flap remained in place while I spoke. It fit snugly around my face, but it also left some inside breathing space.  I think this is a pretty standard KF-94, available from many other companies. I got this one because it comes in a 5-pack, which was an inexpensive way to give it a tryout. My plan is to continue using the Alliable Medical MB 100 for teaching, perhaps switching to the Sonovia or another for attending meetings or other indoor situations where I do not have to do much talking.

Comments

[Ediberto Roman]

Thanks, Steve.

[Enrique]

How about a face shield? You we look dorky but they are much more comfortable than masks...

[Jason Yackee]

My university (and county health authorities) don't count a face shield as a "mask". So if you want to wear a face shield, you can, but you still need a mask. And a mask is not a neck gaiter. It has to be an actual mask.

I think most jurisdictions don't consider a face shield equivalent to a mask.

[Enrique Armijo]

Second the KF94. I ran some speaking volume tests with the fam before the first day of class and a KF94 lets the speaker be heard much more clearly than a K95. I wear one from 10:30 to 3pm on teaching days (except for the lunch break). It seems like the best possible option given the circumstances.