An N95 mask needs to be fit tested before being used by each worker who will wear it. N95 USA N95 face masks made in the USA even though they aren't as good as N95 respirators, surgical masks are still better than nothing. Fold flat fold life1095-2 NIOSH approved N95 here are three places where you can find medical grade N95 masks for sale. It's not recommended that you wear an N95 mask for more than 8 hours in a 24-hour period. Non-scientific masks are cheap and smooth to find in medicine shops or online. There are simple, safe steps you can take to decontaminate your mask between uses, allowing you to wear it for a longer period.