Buy N95 4 Layer Breathing Valve Dustproof Anti-Virus Fog Pathogen Mask Specification Name:N95 4 Layer Breathing Valve Dustproof Anti-Virus Fog Pathogen Mask Material:nonwoven fabric Color: white Mask level: N95 Layer: 4 Features: ●Soft and breathable, sweat-absorbing and anti-allergy ●The design of the cold flow breathing valve is automatically opened when breathing, and the heat inside the outlet cover is taken, and it is automatically opened when inhaling. ●Professional air valve, smooth breathing ●Fabric properties, effectively intercepting harmful substances such as PM2.5 ●Prevent dust from entering the mask ●Comfortable, soft material ●The drawstring is elastic and stretchable ●Comfortable to wear Application: anti-PM2.5, anti-fog, dustproof, anti-bacteria, anti-formaldehyde How to use? 1. Open the mask and pull the ear straps with both hands so that the nose clip is above the mask. 2. Use a mask against the chin