Product: 20 Pack 5 Layers Activated Carbon Filters Replacement, PM2.5 Filter Replacement for Dust Running, Cycling, Outdoor Activities
Brand: Arsmat
【Applicability】The activated carbon filter suit for installing in general double air breathing valve, One size- fits majority of Dust face cover available in the market, can be replaced at will.
【Material】 5-layer design, made of activated carbon and breathable fiber cloth, outside using non-woven fabrics, can isolate the dust, chemicals, particulates, gas, pollen, smoke and fumes.
【Good design】 According to the person face design, good permeability, air resistance is smaller, smooth breathing. (The grain of the PM2.5 filter surface may be attrited during the manufacturing process, but it does not affect actual use)
【Applications】Filter sheet can use for anti-dust, anti-vehicle exhaust, anti PM2.5 and haze day protection; Helpful for cycling, running, biking, hiking, skiing and other outdoor activities.
【Package includes】 20 x 5 Layers activated carbon filters, enough quantity for you to use for a long time, usually recommend replacing the filter every days(Please don't wash the filter because of the activated carbon.)

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