Respiratory resistance

This is an important index for evaluating the comfort performance of dust masks. Wearing a dust mask will increase the wearer's breathing resistance, and the increase in resistance will vary depending on the individual's breathing frequency, depth, and lung ventilation. The resistance is too large. Can cause mechanical narrowing of the respiratory tract, increase oxygen consumption and difficulty breathing, which leads to reduced work capacity of the wearer. On the contrary, the smaller the resistance of the dust mask, the smoother the body feels when wearing a mask.