First point, respiratory resistance of the mask
If the mask of the pregnant woman is too durable, it is easy to breathe and it is easy to affect the development of the abdominal fetus. Therefore, it is generally recommended that pregnant women give priority to breathing resistance when choosing a mask for pregnant women. It is best to choose a resistance of 50pa. If the resistance is 30pa, it can be considered a good maternity mask. Pregnant women's masks have relatively low respiratory resistance and good breathability.
The second point, the mask smell
The mask scent should be the biggest pain for anyone who buys a mask. If you buy a mask for pregnant women, you can't stop the smoke. You will first be hurt by the smell of the mask, and many of the odors are harmful to the human body. Good taste, maternity masks should reject the mask smell. In particular, pregnant women are more sensitive to taste than usual.
Third point, mask filtration efficiency
Filtration efficiency is the most important indicator of a mask. In general, good maternal masks have a filtration efficiency of more than 95%. For example, N95 mask or KN95 mask. It is best to check the brand's mask test report at the time of purchase.
Fourth, the comfort level of wearing a mask
Comfort includes the skin-friendly nature of the mask fabric, the comfort of the mask on the nose mask, the safety of the metal nose strap inside the mask, and more importantly, whether the ear is directly affected by uncomfortable wear and affects the comfort of the ear.
The fifth point, the airtightness of the mask
The airtightness of the mask of the pregnant woman determines whether the mask is worn. If the mask of the pregnant woman is leaked, the mask is no longer good.