Exposing the adhesive is a struggle
If you have to use a  flat folding style KN95 every day at work these will help.  Must keep in mind that a typical  ear strap KN95s seal very poorly compared to regular N95 masks with head straps so their is much more exhaled air coming back around your eyeline.  That being said the foam is a little thick but it also needs to be to allow for facial contour and the sharp nose bridge that typical KN95's have.  My biggest gripe is that it is removing the adhesive backing is a nightmare.  There is no feathered edge and the tape adheres to the backing better than the foam. Once the backing is off your good to go.  I usually try to get about 5 working days (office setting) out of a mask and they hold up fairly well.
Rating: 3 stars