In various implementations, a dental appliance may be utilized to increase an airway and/or reduce snoring. The dental appliance may include an adjustment member, sheath, and a connector that couples the adjustment member and the sheath. The adjustment member may be coupled to a first bite plate, which is positionable over at least a portion of a users upper teeth. The sheath may be coupled to a second bite plate, which is positionable over at least a portion of a users lower teeth. The dental appliance may push a users mandible forward (e.g., closer to an anterior side of a user when compared to an initial position of the mandible) during use.