New clothes often have a small bag attached to the trademark, which contains one or two buttons, several sewing threads and a small piece of cloth, just like this. Buttons and sewing thread are used as spare parts, and buttons can be replaced after falling off. But what about a small piece of cloth? It's easy to think that this is used to mend clothes. This small cloth is made of the same material as clothes. It is used to let us know the characteristics of clothes and test whether the fabric will shrink, fade and deform. Try this cloth first, and you won't regret it until the clothes are washed out.