A garment for the treatment of sleep apnea and/or snoring includes a member for attachment to an individual afflicted with sleep apnea and an elongate, position control member at the rear of the garment and extending outwardly therefrom. The elongate member is a continuous member having transversely spaced-apart side surfaces, and the side surfaces are joined to an outer wall of the position control member at elongate side edges. The side surfaces and/or side edges are located to engage a mattress or other sleeping surface when an individual wearing the garment is sleeping in a lateral position to aid in supporting the individual in a lateral position.
