3M 7000001934 is a half facepiece reusable mask designed to protect against mold and silica hazards. It is not compatible with 3M PAPR systems, but can be used with 3M Supplied Air Systems and welding shields. The mask has a bayonet connection type and features a drop-down feature for easy access. Made from thermoplastic elastomer, it provides good protection and has a large size. The mask has an assigned protection factor of 10 and includes an exhalation valve. Spare parts are available for replacement.