Tyndale FR Single Layer Facemask | Tyndale FRC- fr face mask ,Sold in packs (5 masks per pack) This mask is arc rated and FR, but it is NOT intended to replace arc flash PPE. It is COVID-19 PPE and eliminates flammability hazard.10 Best Face Masks for Virus Protection Reviewed & Rated 2020Dec 03, 2020·Many people say that medical face masks are not effective in protecting against viruses. However, by putting two layers of tissue paper inside, this disposable face mask can be of great help. One thing I liked about this face mask is that it is quite cheap. For its affordable price, you can get 100 pieces of disposable face masks.