Teeter ComforTrak Lumbar BridgeTargeted Decompression Place the Lumbar Bridge in the small of your back just above your hips to add a point of support while inverted that helps to focus and add decompression for the lower back. Variable Arch Adjustable from a subtle, supportive curve to a more dramatic arch, depending on your desired effect. Adjustable Position The tracks in the bed allow you to adjust the placement of the bridge higher or lower on the bed to fit your bodys curve.