I have been making masks for friends and local essential workers.  Proceeds from these sales will go toward  materials to make more masks  - for sale & donation to local essential workers and small businesses.  I use cotton fabric, with a soft fabric on the inside and lined with non-woven lining.  There are 2 darts under the chin and wide at the nose, for a good fit.  I use a variety of attachment styles (elastic or ties), depending on what is available.  I consider this a sliding-scale priced item... everyone should be safe.  They have been very popular - I've shipped to AZ, NY, WA, MN, TX, NC and counting....