
I work for a medical device company and need a mask that I can wear 8 hours a day and still breathe reasonably comfortably all day. These masks are the answer. They are comfortable and breathable. They don't have an overpowering chemical smell and work very well. It's been 6 months for me and I haven't even caught a cold let alone Covid 19! Just remember that you must comply with all other rules, such as: B. Washing hands, keeping your distance from others, and it's a good idea to use rubber gloves. I have a bad habit of touching my face, but these masks seem to work pretty well no matter what. I had no problem wearing one mask a day, so with normal use you should be able to get through 50 days with this box. I'm not a doctor, so please check with a doctor before taking my once-daily use advice.

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