A mouth appliance for maintaining effective airflow in a user's airway comprises a frame formed to engage the user's upper and lower teeth to retain the frame in a selected position in the user's mouth in accord with the user's natural bite. A tongue depressor is mounted to the frame and formed to extend to a rear portion of the user's throat and to exert pressure directly on the tongue in the area of the user's soft palate, thereby facilitating comfort and ease in occasional swallowing, while providing airflow effectiveness to prevent the user from snoring and experiencing sleep apnea.