How do you know if your respirator mask is truly effective at blocking germs? Reusable is there a reusable N95 mask although many people believe that the effectiveness of these masks decreases over time. Free N95 masks free N95 masks online order if you are determined to obtain your practical some N95 masks available up available. What You Need to Know About N95 Respirators and Masks, and Where You Can Get Them. But appropriate disposal is necessary to prevent the spread of germs. This mask will assist you in protecting yourself from the flu as well as smoking and other airborne pollutants if you choose to use it.