N Grade 99 with cool valve 12 pack Brand New

New BOX of 12 N99 as pictured. - 12 Pack N Grade 99. Condition is New. Filters 99%  of particulates with valve! These are actually very comfortable. Shipped quick! Expires 2023 Better than N95 these filter 99% instead of only 95%. FINAL SALE, NO RETURN Blocks 99% of non-oil based particles HEPA filtration! PRECISION N99 HEPA FILTRATION – Made to protect against non-oil-based particles as small as 0.3 microns. This precision of this unit was designed to allow you to breathe easier indoors and o