This item is available to ship in 3-4 business days.
【High-quality Material】Made of activated carbon and non-woven melt-blown filter cloth, keeping away from PM 2.5 and a range of airborne contaminants.
【Five-layer Filtration】Multiple protection to isolate dust, multi-layer folding, good ventilation, double your protection with an additionalfilter.
【Wide Applications】Ideal to protect your mouth and face from dust, haze, germs, allergies, smoke, pollution, ash, pollen, gardening and craft particles.
【Reasonable Size】Filters size measures 4 x 2.75 inches/ 10 x 7 cm, compatible with most dust masks, easy to insert or replace the original one.
The Replacement Filters are disposable supplies and cannot be washed.
We recommend changing the filter once or twice a week, depending on the amount of outside exposure. If a mask is worn for casual activities at private or limited exposure areas for 8 hours a day, the filter should be changed once a week. However, if the mask is worn in areas with a large amount of open exposure for 8 hours a day, it should be replaced twice a week. The PM2.5 filter’s air resistance will increase over time as the spunbond fibers accumulate airborne particles, making it noticeably more difficult to inhale. When this happens, the filter should immediately be removed and replaced.