N95 Mask Decontamination Information Interest in decontamination and re-use of N95 and similarly rated particle filtering face respirator (FFR) masks designed for single use remains high due to sustained unmet demand during the COVID-19 pandemic. The 3M™ 8210 N95 particulate respirator mask. NIOSH approved for at least 95 percent filtration efficiency against certain non-oil based particles. Two-strap design with welded dual point attachment helps provide a secure seal. (used in Hospitals by Doctors and Surgeons for 8-12 hour use via two straps to the back of the head). Features: