The water repellency of the fabric is measured by the Bundesmann rain method, which simulates the water repellency of the fabric when it is subjected to a shower under exercise. The test sample is fixed on a test cup with a wiper device. Rainwater falls from a height of 1.5 meters. By measuring the water content in the cup and the water content on the surface of the test cloth, the water passing through the test sample and the water repellency of the fabric can be evaluated.

GB/T14577 ISO9865 BS EN 29865 DIN53888 JIS L1092, etc.