PVC patch is also called hook and loop fastener, or snap button. It is a kind of attachment material commonly used on clothes. It divides male and female sides, one side is small and soft fiber, and the other side is harder like a small hairy thing. It is divided into two sides, one side is hooked bristle, (HOOK) the other side is round hair (LOOP). The general clothes HOOK is on the top. It is very common in our daily life. It is usually used in mobile phone pockets and pockets. Two pieces of things will stick together. Today we will talk about its advantages and usefulness.