The US made N95 respirator conforms to NIOSH surgical N95 standards. These masks filter at least 95% airborne particles that are non-oil based. This N95 mask is lightweight in construction to promote greater worker acceptance and helps increase wear time. Sold unimprinted. Meets NIOSH Title 42, code of Federal Regulations, part 84 (42 CFR 84). Pre-formed for secure fit. Adjustable nose clip made of plastic galvanized iron wire will help provide custom fit and secure seal. Latex free. Spandex filament sponge bar with Nylon string.