Yu Hengpeng n95 mask is quite good.
Yu Hengpeng N95 mask can filter out more than 95% of bacteria and viruses, the diameter of the filtration is smaller, compared with medical protective masks, N95 masks have better protection and airtight.
Mask wearing norms:
"No matter what kind of mask, norms are very important to wear." Huang Ying told reporters, wearing a mask before the first to pay attention to hand hygiene. Should wash your hands or use disinfectant wipes to wipe your hands clean before wearing a mask to avoid contamination. When wearing a mask, be sure to cover the mouth and nose, some people only cover the mouth but the nose to reveal the difficult to achieve the purpose of protection.
At the same time, you need to make sure that the mask fits closely to your face. For the same mask wearing time, experts recommend that medical protective masks a wearing time of no more than 6-8 hours, medical surgical masks is 4-6 hours, long time out of the case of the best to carry a spare mask.
"4 hours down, may want to eat or work environment change, the same mask worn for a long time, may be in contact with the polluted environment, and different people talk may also be splashed in the mask, then we recommend to be able to go in time to replace it." Mr. Huang Ying pointed out that, especially the current cold weather, wearing a mask outdoors will have condensation on the inside, so it is more important to replace it in a timely manner.