Each filter lasts 5-7 days depending on use.
- The PM 2.5 activated carbon filter solves the security issues of your necessary outdoor activities. No need worry about the current problem of insufficient masks.
- The first layer of spunbond filters out micron-sized dust; the second layer filters industrial pollutants, car exhaust, second-hand smoke and pollen allergens.
- The third layer of activated carbon cloth filters out micron-sized dust; the fourth layer provides filter density for smaller materials.
- The fifth layer of spunbond filters out various harmful substances.