DHL free shipping kn95 mask 5-layer filtration rate of more than 95%, dust-proof and anti-fog PM2.5 disposable mask 3D stereo breathable KN9

1. Five-layer protection, double-layer melt blown, say no to air pollution; 2. Three-dimensional ventilation, easy breathing; 3. Elastic ear cords, comfortable travel; 4. 5-layer filtration, safe purification;