[1] Originally bred in the Trøndelag region of Norway, from where the sheep derives its name, the Grey Troender are most commonly varying shades of grey in color with distinctive white "tear drop" markings under the eyes.
[2] However, black, brown and white woolled Grey Troenders occasionally do occur.
The wool of the sheep is uniform with mean fibre diameter of 32.3 micrometres and 2–3 kg (4.4–6.6 lb) greasy fleece weight.
Lambs are generally slaughtered at 6 months age (30 to 40 kg (66 to 88 lb) live weight).
In 1998, the Committee on Farm Animal Genetic Resources established a project for collecting and freezing semen from Grey Troender sheep rams in an effort to revive the breed.