Domestic Long Hair isn't a breed. It's the label used for mixed-ancestry cats with medium to long fur, the fluffy counterpart of the Domestic Short Hair. They come in every color and pattern, from tabby and calico to smoke and bicolor, and most weigh between 8 and 15 pounds, though long fur can make a cat look bigger than it is. Some resemble a Maine Coon or Persian without sharing that ancestry.
Because there's no breed standard, personality and coat texture differ from cat to cat. Many are affectionate and adaptable once settled, and mixed ancestry tends to bring good genetic diversity. In Chapel Hill, where long, warm summers meet frosty winter nights, the practical points are a steady brushing routine and a cool place to rest indoors. Spend time with a cat before deciding; that tells you far more than the label.