One of my hard-working machines has gone in for servicing, but I have made up some more 3-layer re-usable non-medical masks if anyone is needing one.
Outer layers are cotton, sandwiching non-woven polypropylene filtering fabric - as recommended by McMaster University. Adjustable ear loops made of knit material, sizes M and L.
Fully washable - throw them in with the family laundry and hang to dry completely. $15 each.
Pictures upon request to puzzlnut@telus.net.
Pat English