A "striped cat" refers to a cat with a vertical stripe running down the center of its head, commonly known as the "midline." This line is usually made up of fur, so it's not formed by any structure on the skin. Some cats have their fur forming a V-shape on the top of their head, while others have it forming an M-shape.

The appearance of swivel cats varies depending on the breed, but they are generally very cute and charming. Some swivel cats have very soft and thick fur, while others have shorter and coarser fur. In addition, the color and pattern of the fur of swivel cats also vary from breed to breed; some breeds have solid-colored fur, while others have multi-colored fur.