I want really a mask that I can use at work to stop making mistakes. I've tried different companies and they all suck. The mask is not breathable. It is made of a material that prevents its use. To be usable, it must be made of cotton. Once again I wasted my money. Don't buy this mask because even to return it you have to pay the shipping to send it back to China which is more than what you paid for the mask. I don't know how they get such a good rating because the filter makes it even harder to breathe. I work in a very active physical job where breathing is essential. For example, I walk up to 7 miles a day and transport patients around the hospital. I need to be able to breathe properly while lifting them uphill when I'm putting the most energy into them. I can't wear this mask at work at all. That's a waste of money.
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