they work to keep the mask fabric directly off of your face.
I like them. They help keep the face mask material off your face and make it easier to breathe in a mask. They are semi flexible and non irritating and easy to wash. The only thing i dont like is i have to hold them against my face while applying the mask so they dont fall or move out of place. I may attach a thin piece of elastic that will wrap around my head to hold them in place.
Rating: 5 stars