100Pcs POWECOM 3703 Filter Cotton For 3700 PM2.5 Mask Professional Labor Protection Face Mask Filte
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These filers along with the 3200 PM2.5 Gas Protection Filter Respirator Dust Mask are Great they are easy to use and swap out. The mask itself is very comfortable and stay comfortable for hours of use, as i wear then for up to 8 hrs a day. I wouldn't hesitate to purchase these filters and the mask.
Good product, according to the description..