Repeated wear of cloth masks can cause unpleasant odors, discoloration and deterioration of the fabric, explains Jeffrey Keane, CEO of BFTP Client Noble Biomaterials, a biotechnology company specializing in antimicrobials for soft surfaces. Antimicrobial masks aim to solve that issue, in addition to self-sanitizing — basically, the face mask includes materials that help keep it clean as it helps keep you clean. These cloth masks are designed to be odor-resistant and to help prevent the growth of bacteria on the surface of the fabric, said Keane. Noble Biomaterials created an EPA-registered antimicrobial found recently in some masks in the market.Via NBC News