Activated Carbon Mask Filters 5 Layers N99 Dust Mask Filter Replacements Authentic Cotton Sheet Replacement Parts for Mesh or Neoprene Cycling Mask (White Gray 24Pcs);

FEATURES:
The Mask Replacements cotton sheet made of activated carbon and breathable fiber cloth,
suitable for install in general double air breathing valve activated carbon dust mask.
Active carbon filtration (N99 - PM2.5) can isolate the dust, particulates, gas, pollen, smoke, allergen and pollution sized 0.3 micron or greater

APPLICATION:
For use with mask for anti-dust, anti-vehicle exhaust, anti PM2.5 and haze day protection.
UNIVERSAL USAGE : anti pollution mask for home improvement projects: as a paint mask, mask for cleaning, woodwork, mowing etc.
It can also be used as an allergy mask to filter allergenic pollens and as a mask for flu.
Our customers use the face mask for running and cycling.
Similar to the elevation training mask - the breathing mask may also help your lung capacity training by mimicking high altitude/low oxygen level conditions.
ANTI FOG UPGRADE : Dust masks are often used with safety goggles.
Our latest modification - anti-fog upgrade is designed to protect your glasses from fogging up.
SPECIFICATION:
Material: activated carbon, breathable fiber cloth, non-woven fabrics，meltblown cloth
Colors: Grey
Product size: 3.5 x 4.3 inch
Quantity: 24 or 12

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.