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Does it matter how long an NI is in place.

 The answer to this question will differ depending on where you bought the mask and what you intend to use it for. In order to help you determine how long your NIOSH N95 mask will last and what to do with it when that time arrives, we have created this detailed reference on expiry dates and other factors influencing its service life. In any case, this should help you decide what to do with it. Go ahead and dive in! Having a variety of masks in your home is the best idea. When it comes to protecting your lungs, we don't suggest utilizing either a surgical mask or an ordinary dust mask. Always double-check the masks you buy for expiration dates. When should a mask that has been used once be thrown away? You may use a normal disposable respirator for up to three years. If you have many mask sets at home and one of them is about to expire, you should switch it out with the set you maintain as a backup in case you need them. A extended shelf life is a must for you when purchasing face m...