Domestic Long Hair isn't a breed. It's the label for a mixed-ancestry cat with a long coat, the fluffy counterpart of the Domestic Short Hair. They turn up in every color and pattern, from tabby and calico to solid black, smoke and bicolor, and some resemble a Maine Coon or Persian without sharing that ancestry. Most adults weigh 8 to 15 pounds, and the long fur can make them look even bigger.
With no breed standard, size, coat texture and personality vary from one cat to the next. What they share is a coat that needs regular brushing to prevent mats and hairballs, plus the broad genetic diversity that tends to keep mixed cats healthy. In Detroit, where winter keeps cats indoors for months, that brushing becomes a year-round habit.