
I don't have a medical or scientific background but being at home in COVID-19 isolation I've had a lot of time to spare examine what is considered effective and preventive face covering, additional filters and their formulations, what to spray or not to spray without affecting the protective properties of the mask, how to effectively disinfect masks without polluting the environment, safe or unsafe reuse and various Improvements have been effective in trying to protect users from this virus. The composition of these pre-cut filters from this seller matches some others made by reputable companies and sellers. I feel like I can trust this product to do what it is described as doing.

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