What you will get: package comes with 8 pieces PM2.5 mask and 16 pieces filter, there are 4 different colors, black, grey, navy blue and wine red, filter is flexible for replacement，the anti pollution mask can be applied to sporting, running, hiking, climbing and many more purpose, allow a double layer protection of gases, smells, PM2.5, PM0.3, pollen, smoke for you, recommended replacement of 1 or 2 times a week

N99 filter protection： our certified N99 dust mask will help protect your lungs from substances like pollution, carbon, construction dust, paint, particulate, insulation just plain cold air. Fitted with exchangeable activated carbon filters, our particulate mask will filter out 99% of all harmful particles in the air that your eye cannot see.

Activated Carbon Advantage and exhaust valve: charcoal filters can eliminate harmful air particles . we've harnessed the absorbing power of activated carbon to help defend your respiratory system. When you breathe through the air filter mask, the particles stick to the carbon and stay in the filter, preventing them from entering your lungs.Uses Military Grade Filtration Technology N99 filtering out 99% of particulate pollution. exhalation valve can helps to breathe smoothly ,effective against

Adjustable design: washable reusable mask has M-shaped nose clip and elastic ear loop, makes valve breathing mask and nose fit better and won't add burden to your nose, avoid breathing caused by the fog of glasses,prevent the slide, give you a nice wearing experience.one size fits most.

breathable and multiple used:The valve on the outside of the smoke mask works as a security gate when breathing. It closes when you breathe in and opens up when you exhale, this allows your hot air to escape quicker & keeps you cool. valve breathing mask can be used by people in schools, at work, outdoors activities, traveling, gardening, construction, woodworking, sanding, painting, cleaning, sports, fitness, training, running, hiking, climbing, skiing, cycling, motorcycle and more.