The GB/T 33622-2017 standard specifies the test method for the determination of low-temperature flex of soft foam coalescence materials. This standard includes sample preparation, selection of test equipment and setting of test conditions, and describes in detail the steps for flexible testing of soft foam materials in low temperature environments. The low-temperature flex test results are important for evaluating the application performance of materials in cold climates. They are suitable for application scenarios such as refrigeration equipment and automotive interiors that require material performance stability in low temperature environments.