I don't know you when you change your vest?

I don't even know you when the turtle changes his vest? The tortoise changed its shell in an attempt to disguise itself from being found. Although the tortoise has changed its shell, it will still be seen through at a glance. Another meaning is that when a person wants to escape, he takes off his clothes and changes them into others', but people recognize him according to his physical characteristics. We will see these scenes in TV series. When a traitor tried to escape, he disguised himself, put on makeup and put on other people's clothes, even women's clothes, but he was finally recognized and brought back.