At present, some brand-name fakes, off-the-shelf products and some clothes that claim to have waterproof and moisture-permeable functions appear in the domestic outdoor products market. Although they are marked with GOER-TEX, they mainly use PU composite fabrics/fabrics and TPU composite fabrics/fabrics.

From the test data, the current test standards mainly include ASTME96BW (7 types) in the United States and JIS1092B (6 types) in Japan. TPU can reach: water vapor transmission rate 5800g/m2/day, static water pressure 10000mmH2O E-PTFE is almost the same, but this test is carried out under normal temperature and static conditions. The moisture conduction is greatly affected by temperature, humidity and air pressure. Under static conditions between 20 degrees and 30 degrees, the TPU composite fabric/cloth and PTFE composite fabrics/fabrics are equivalent, but under dynamic conditions, the amount of exercise is large, and the moisture conduction of TPU is limited due to increased sweating. It is too late to spit out when you are full. The molecular activity of the fabric/cloth decreases and shrinks. At 0 degrees, the moisture conductivity of the TPU composite fabric/fabric decreases exponentially. When it is below 0 degrees, it is almost zero. When it is minus 15 degrees, it becomes brittle and easy to break. If you pour boiling water directly on it When the temperature is high, it will deform, but E-PTFE will not change when the temperature is between minus 150 degrees and 300 degrees. The moisture conductivity remains the same, and it can discharge water vapor faster, keeping you dry and comfortable.