Pioneeryao Sport Dust Mask Cycling Running Outdoor Face Mask Starter Training Mask for Men and Women[Product Information]- REPLACEABLE ACTIVATED CARBON FILTER -- helps you breath in a more CLEAN and more ENVIROMENTALLY FRIENDLY way. Activated Carbon isolates 95% of dust， pollen， hazardous chemicals， heavy metal particulates etc. With the replaceable design， you only need to change the Filter instead of the entire mask， which is more environmentalist.
- TWO VALVES DESIGN act as blockers to the air， which help to achieve the effects of high altitude&low air concentration condition. This will increase the efficiency of your lung capacity training to some extent.
- SOMATOLOGICAL DESIGN provide MOST COMFORT to users. Comfortable fabric， Adjustable Nose pad and Velcro closure to meet most people's specific needs.
- Excellent in windproof and dustproof performance， typically good for buyers who like cycling， running， or doing other outdoor activities in autumn， winter and spring.
- What we promise: Our product made of high quality materials. But if you are still not satisfied with our products by some reason， please let us know， we promise 100% refund will be issued after communication.
