Please Note:

Usually one filter can be used for 30 days, It is recommended to change at any time during flu and heavy pollution periods

Filter Activated Carbon PM 2.5 FM

Activated Carbon Dustproof . Do you have problem with dust chemicals, smoke and particles. Do you want to enjoy a free outdoor life? . Moving purifying respirator? It is large and burden. That's a good reason to buy this Activated Carbon Dustproof. Refused to be a human vacuum cleaner. A Must Have for outdoor activity suitable for dust, anti-vehicle exhaust, anti-pollen allergy, PM2.5, for cycling, hiking, skiing and other outdoor activities