rosesinbud 3 If you are worried that you don't know what kind of mask is best, the n95 or n100 rated masks are the ones used by medical personnel who have to actually handle people who have corona virus. Ordinary people who are not around sick people should not have to use these, but they certainly are made for the job. So, if you are around sick people, or just really worried about exposure and want to go for the best mask, these are great. It would be nice if the prices had not increased many times their ordinary cost , but I plan to hold onto these because this is just the first of the pandemic viruses and others will follow, so better plan ahead! The cost is a pinch on the wallet though.