I have been sewing face masks since April. I have now sewn a total of 94 and have not charged for any of them (my way of serving during this pandemic). My face masks have a pocket on the inside for inserting a pipe cleaner, wire, and now your metal insert! The pipe cleaners were not lasting at all, so I saw an advertisement on Facebook for your metal strips so I ordered some with the black tube elastic (love these, too). With the metal strips that conform to your face helps with glasses fogging,...