We use NHS grade high quality supima blend cotton, professionally tailored, reusable, and machine washable two-ply fabric face mask. Dual over-ear elastic straps or behind the head. Provided with a clear plastic area to allow sight of lip and mouth movement. Developed in partnership with NHS Tayside and Dundee University. A strong, densely woven 100% cotton supima blend, with hydrophobic and sanforised finish.