5 Layers KN95 Face Mask with Breathing Valve

Disposable dust mask with large-diameter filter can dehumidify and ventilate. It can effectively remove hot and humid gases, while preventing haze, ultra-low breathing resistance, more comfortable to wear, help to remove air, reduce heat and moisture accumulation, and the glasses will not fog. Features: Shelf life: five years Model: Ear-hung breathing valve Condition: 100% brand new Duration of use: 6 hours of continuous use, 5-7 days of intermittent use Protection level: KN95/N95 level, filtering efficiency of non-oily particles is above 99% Product features: anti-dust, anti-sand, anti-fog, anti-allergy, anti-bacterial. PM2.5