High efficiency filter cotton inner support increases gas flow space, low respiratory resistance, high efficiency;
Unique eccentric core structure, does not affect the lower visual field, uniform force mask, reduce neck pressure;
Unique fan type exhalation valve, low exhalation resistance, not stuffy, more quickly exhalation chamber of moisture, heat;
One-way drainage valve, discharge specific internal steam, dry and comfortable;
The combination of elastic band and headband reduces the pressure on the head and neck and does not affect the wearing of other protective products.