(Free Pattern ) Easy DIY A Mask with a Replaceable Filter
Mar 11, 2020·I saw the latest news about the fabric mask with an n95 filter (PM 2.5 N95 activated carbon filter). In case there’s n95 filter in it, the fabric masks are 85%-95% effective. And you can use n80-n95 masks for about 3 days without efficiency drop. I will leave links for Canada and USA. I hope it helps. Stay safe and healthy!