Gejoy Mask Filter Sheet for Cycling Dust Prevention Mask, Activated Carbon Filtration Air Filter for Outdoor Activities (14 Pieces);

Features:
The mask filter cotton sheet made of activated carbon and breathable fiber cloth, suitable for install in general double air breathing valve activated carbon dust mask, can isolate most dust, chemicals, particulates, gas, pollen, smoke and fumes.

Application:
For use with mask for anti-dust, anti-vehicle exhaust, anti PM2.5 and haze day protection. It is suitable for cycling, running, biking, hiking, skiing and other outdoor activities.

Specification:
Material: activated carbon, breathable fiber cloth, non-woven fabrics
Colors: gray
Product size: 3.5 x 4.3 inch
Quantity: 14

Package includes:
14 x Mask filter cotton sheets

Warm tip:
The mask filter replaced steps:
1. Open the mask to expose the interior of the filter valve.
2. According to the OPEN directions on the valve,turn the valve counter, to separate the valve.
3. Remove the filter.
4. Replace the new filter, iterate the above steps, rotation of the valve, over.

Notice: our package not include masks and valves.