Layers of materials, or combination materials, from wearer side to the outside, rate of passing the permeability test, and the corresponding pressure drop.

Layers of materials, or combination materials, from wearer side to the outside, rate of passing the permeability test, and the corresponding pressure drop.从穿戴者侧至外侧的材料层或复合材料层、透气性测试（permeability test）通过率，以及对应的压降（pressure drop）。