Classification and Application of Waterproof and Breathable Fabrics
Waterproof and breathable fabrics refer to textiles that, during wear, prevent liquid water from penetrating under a certain pressure, while allowing perspiration from the human body to pass through in the form of water vapor, keeping the wearer dry and comfortable. The waterproof and breathable property is achieved based on the principle that water molecules are much larger than water vapor molecules. The pores on the surface of the fabric are much smaller than water droplets but significantly larger than water vapor molecules. Garments made from such fabrics can resist wind, rain, and snow while remaining breathable, preventing overheating during exercise and maintaining comfort when movement stops. If a fabric were only waterproof but not breathable, sweat would accumulate inside, making the wearer feel cold. Moreover, these fabrics are also wind-resistant, maintaining a layer of still air between the body and the garment for warmth. Without windproof performance, insulation would b...