An application for a back brace for supporting both the abdomen and lower back of the user includes an abdominal support member and a lumbar support member having a convex dome facing inwardly towards the lumbar region of a wearer; the support members joined by two belts. The belts are positioned though a slot on each side of a member and are used to adjust the biasing force between the members. The device further includes sleeves over a central region of the members providing additional comfort.