Assessment of Fabric Masks as Alternatives to Standard ...
Apr 17, 2020·Charcoal Charcoal filter mask with no brand/producer information available. 3-ply nonwoven material with 1-ply charcoal/polymer nonwoven filter and nose wire and ear loops. 3 Sewn Fabric Mask A 2-ply cotton pocket with replaceable organic cotton batting filter. 21 cm ×10 cm rectangular pocket without pleats and with elastic ear loops. 1