Domestic Long Hair is a coat description, not a breed. It covers mixed-ancestry cats with medium to long fur, in every color and pattern from tabby and calico to solid black and smoke. Some resemble a Maine Coon or Persian without sharing that ancestry. Adults usually weigh 8 to 15 pounds, and the fluffy coat can make them look even larger.
Because there's no breed standard, personality varies from cat to cat. Many are affectionate and adaptable, while others take time to warm up. What they share is a coat that sheds and can mat, so regular brushing matters. In Palm Springs the coat also means thinking about heat and blowing dust, and meeting a cat in person tells you far more than the label does.