GB/T 39369 - 2020 focuses on the determination of moisture permeability in the physical and mechanical tests of leather. It details the preparation method of leather samples to ensure that they can truly reflect the characteristics of the product. Standardize the water permeability measurement equipment to clarify the requirements of instrument accuracy and parameters. Rigorously describe the test process, including the test environment temperature Humidity control, test time setting and other key links. According to this standard, the moisture permeability performance of leather can be accurately measured, providing important performance data for the application of leather in shoes, boots, clothing and other fields, and helping to improve the mass of products and optimize functions.