Domestic Long Hair isn't a breed. It's the label shelters and veterinarians use for a mixed-ancestry cat with a long coat, the fluffy counterpart of the Domestic Short Hair. They come in every color and pattern, from tabby and calico to solid black and smoke, and some resemble a Maine Coon or Persian without sharing that ancestry.
Because there's no standard, size, coat texture and personality vary widely. Most weigh 8 to 15 pounds, and the long fur can make a cat look bigger than it is. Mixed ancestry also tends to bring good genetic diversity. In Amarillo, dry air, wind and freezing winters make regular brushing and a warm indoor home especially useful. Meeting the cat in person tells you far more than the label does.