Torbie isn't a breed. It's a coat pattern that blends tortoiseshell patches of black-based and orange-based color with tabby stripes, swirls or spots, often with the tabby M on the forehead. Variations include brown, blue-and-cream and silver torbies, and a torbie with a lot of white is sometimes called a caliby.
Most torbies are domestic shorthairs or longhairs, so weight runs roughly 6 to 14 pounds and coats range from sleek to fluffy. Shedding is moderate, and weekly brushing keeps hair off the furniture, which matters in a smaller apartment. Cats of every temperament wear this pattern, so spend time with a cat before deciding. Torbies often live 12 to 18 years, a long commitment worth planning for.