KN95 disposable mask five-layer structure odorless and pollution-free non-woven disposable folding mask PM2.5 dustproof and windproof protec

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;