These masks are intended to be used for protection against solid, such as, those from minerals, coal, iron ore, flour and certain other substances. They are extremely durable, have a soft and comfortable inner surface, an adjustable nose piece and secure head straps to provide proper fit. These masks have 510(K) number for the medical market.
MSDS' best practices website is not a standard or regulation, and it creates no legal obligations, nor does it change any existing OSHA or other government standard or regulation. The guide is advisory in nature, informational in content, and is intended to assist employers in providing a safe and healthful workplace.