The Seppala Siberian Sleddog is a rare working dog breed, the Seppala Siberian Sleddog is developed for the purpose of pulling a sled in cold country. It is a moderate-sized dog averaging 18 to 23 kg (40 to 50 pounds) weight and 56 to 58 cm (22 or 23 inches) height. Colours and markings are considered of little importance; eyes may be brown, blue or any combination of the two colours. Seppalas are active and energetic but very docile and trainable.

The defining characteristics of the breed are its natural, primitive appearance, its highly developed work ethic, and its affectionate, cooperative, and highly bonded nature. They tend to be more trainable than other sled dogs and to be more highly bonded to their owners. The Seppälä Siberian Sleddog disposition is active, merry, and often quite inquisitive, although sometimes showing great reserve with strangers. A stable and serious temperament, neither nervous nor aggressive, is characteristic. Natural, innate sleddog mentality is a primary characteristic of Seppälä dogs. Their nature is highly cooperative. They show great seriousness in their work in harness.