Keeps pollutants out while offering comfort thanks to the built-in exhalation valve and soft and stretchy elastic loops.

Built-in exhalation valve lets air in and keeps moisture out, letting you breathe easier while keeping dust and other pollutants out.

Comfy elastic and wide ear loop lets you wear these masks for long periods of time without irritation.
It is suitable for cycling, running, biking, hiking, skiing, woodworking and other outdoor activities.

The dustproof mask can be used for anti-dust, anti-vehicle exhaust, anti-pollen allergy, anti PM2.5 and haze day protection.

Easy to wear and they provide a superior level of protection over the paper masks.
Comfortable for long periods of time.
Washable
Collapsible, you can put it inside your pocket and bring it anywhere.