The ASTM D4355/D4355M-21 standard is used to evaluate the deterioration of geotextiles under Xenon-arc radiation, moisture, and heat. The test simulates the environmental conditions that geotextiles may encounter in practical applications, including light, moisture, and heat. The durability and long-term Stability of a sample are evaluated by measuring the changes in its Mechanical Properties under these conditions. The test results are useful in predicting how the material will behave in actual use, but do not include the effects of factors such as atmospheric pollution and biological attack. Suitable for quality control and performance verification of geotextiles.