The ASTM D2221 standard test method is used to evaluate the creeping properties of Encasement cushioning materials under static loading. This test measures the change in thickness of the cushioning pad after static loading is applied to help understand the Stability of its performance during storage, handling, and transportation. Creeping data can be influenced by a number of factors, including static load size, sample area, shape, and thickness, and environmental conditions. Test results are helpful in evaluating the suitability of the material, but do not necessarily fully reflect the performance in the actual Encasement environment. The standard does not cover all safety issues, and users need to develop appropriate safety measures.