Sold in Packs of 10
Carbon filter size measures approx. 4.7 x 3.1", inserts easily into adult size masks with pockets.Five layers of PM2.5 Carbon filtering,Made of activated carbon and non-woven melt-blown filter cloth,effectively keep away from PM2.5 and a range of airborne contaminants.
Filters anti-airborne particles dust, pollution, ash, pollen, etc.
PLEASE NOTE: PM 2.5 filters are disposable and not washable.