3M’s advanced hard case particulate filter offers above-and-beyond protection in an easy-to-use package. The exclusive Secure Click attachment better ensures proper installation over traditional bayonet-style filters. 3Ms Filter offers protection against permissible exposure limits (PELs) far beyond OSHA standards, with a NIOSH certification that guarantees 99.97 percent particle filtering efficiency. From construction to remediation, the hard-case filters offer higher-heat durability in environments filtering lead, asbestos, cadmium, arsenic or MDA. 3M's innovative filters offer a convenient and comfortable way to ensure the highest standards of worksite safety. Note: Not designed for use in immediately dangerous to life or health (IDLH) environments.