On traditional air filter materials, if you want to achieve a higher filtration effect, the pressure loss may be higher, high pressure loss leads to greater resistance. In other words, more effort when the wearer inhales. In order to achieve higher initial efficiency and lower Inhalation resistance (low pressure loss), electrostatic cotton is widely used in the application of masks. However, there are many types of electrostatic cotton, and there are many ways to add static electricity, and the purity of the material of the filter material, the type of additives and other factors, so after adding static electricity, the efficiency increases. The breathing resistance for N95 masks is usually around 180~220pa (The higher pa value is, the more resistance when breathing) 0.075μm Nanofilter adopts electrospinning technology to extract very fine (usually micron or nanometer) fibers from a liquid by using electric charges. No chemical coagulation or high temperature is required to produce solid fibers from a liquid, which makes this process particularly suitable for the production of large or composite fibers. It can be used to extract fibers from the melt, so that there is no trace of solvent in the final product.