children cotton mask mask dust reused pm2.5 anti activated carbon disposable filter windproof f 1k7y 25m5l

material: cotton applicable gender: child (male / female) function: anti-fog and haze, industrial anti-pollution, anti-vehicle exhaust, dust, secondhand smoke, pollen allergy, cold keep warm, etc if you need more filters, please click this link: https://www.dhgate.com/product/child-pm2-5-black-mouth-mask-5-layer-anti/527039588.html