Dust Mask Cycling Running Outdoor Face Mask Training Mask

Features：
Comfortable fabric, Adjustable Nose pad，meet most people's specific needs.
Two valves design，act as blockers to the air, which help to achieve the effects of high altitudelow air concentration condition. This will increase the efficiency of your lung capacity training to some extent.
Excellent in windproof and dustproof performance, typically good for buyers who like cycling, running, or doing other outdoor activities.
After covering your mouth with the mouth mask, you could wrap your ear with the strings to keep it in place，don't need to worry too much that the face mask will slide down easily.
When you are outdoors where is filled with harmful materials like dust, chemical material, smog and other microbial particles, you could put on this half face mask to keep your nose and mouth away from them to avoid the breathing problem.