A user or assistant operated device for elevation and forward thrusting of the jaw for mild to moderate obstructive sleep apnea is disclosed. The device includes a base configured to contact a torso of a wearer, a chin support configured to contact a jaw of the wearer, and a jack extending between the base and the chin support. In this regard, the jack is length adjustable and configured to elevate the chin support relative to the base such that the jaw is thrust forward relative to the torso.