Hi everyone, I saw my doctor at Mayo Clinic yesterday. He had one of the facemasks that I sent to him in the spring time in his pocket. He liked it very much and said he could use more. So I am sending him my current stock of facemasks to Mayo Clinic and my doctor is going to give them away at Mayo Clinic. He even put it into my note that I offered to sew facemasks for health care professionals and was sending some. I have 92 right now. So I am happy and pleased that I can make homemade facemasks to the Mayo Clinic standard. They always require the best no matter what it is. I use 100% quilting cotton or cotton sheets for the front. Then I use premium muslin for the interface. Then I cut 2" or 3" elastic bands into narrow ribbons for ear loops. I also use 100% cotton quilting thread. Then I iron pleats into a starburst pattern so that when do my final sewing that the facemasks have a concave shape. That's more comfortable for the wearer.