Domestic Medium Hair is a description, not a breed. Shelters use it for mixed-ancestry house cats whose coats fall between short and long: noticeably fluffier than a typical domestic shorthair, often with a fuller tail, tufts between the toes and a soft undercoat, but without the heavy ruff and flowing length of a true longhair. They come from the general cat population, so they appear in every color and pattern, from tabby and tuxedo to calico and solid black.
Because their ancestry is mixed, size, personality and health follow the individual cat rather than a breed standard. Most are medium-sized, sturdy and long-lived, and their genetic diversity often serves them well. Adopters can expect a bit more brushing than a shorthair needs, especially in spring and fall, and the best guide to temperament is meeting the cat.