Domestic Long Hair isn't a breed. It's the label for a mixed-ancestry cat with a medium-to-long coat, and these cats turn up in every color and pattern, from tabby and calico to solid black, smoke and bicolor. Some look like a Maine Coon or Persian without sharing that ancestry. Adults usually weigh 8 to 15 pounds, and the fluffy coat makes many look even bigger.
Because there's no breed standard, size, coat texture and personality vary from cat to cat. In Manhattan, where winters are cold and summers hot, the coat is the main thing to plan around. Shedding is moderate to high, and brushing several times a week keeps mats and hairballs in check. Mixed ancestry tends to bring broad genetic diversity, and many of these cats live 12 to 18 years.