PM2.5 Dust Mask, Reusable Breathing Valve Respirator Mouth Masks,Activated Carbon Filter Protection from Dust, Pollen, Pet Dander 

Features: 
1. The adjustable elastic buckle makes comfortable wear. 
2. Nose part design gives large space for free breathing. 
3. Adjustable metal nose piece can get fit with different face shape and seal better. 
4. A layer PM2.5 filter helps to prevent dusts and other small particles. 
5. Fine Polyester fiber provide soft, comfort and good moisture permeability. 

Cleaning Method: 
1. Plug-in PM2.5 filter can not be cleaned, suggest to replace once a week. 
2. Clean with neutral detergent.