This form is known as Ami Wit, and It is a bull skin which was Anubis wrapped and embalmed the body of Osiris. After his brother Set had killed him, It is always depicted in this form, with blood drops hanging. On the body, it is often represented by the spotted shape. It is mostly bull skin. And it became an important icon and a symbol of Osiris, And then the linen ligaments came to replace it. And be a substitute for it, according to the famous legend.