I've had two spine surgeries in the last four years, and it is very important to keep my spine aligned when I sleep. I've tried using a folded head pillow, a long pregnancy-type pillow and a leg pillow from another company. Both the head pillow and the long pillow were too bulky and too hot in warm weather. The leg pillow was an odd shape, and I often found it on the floor next to the bed in the morning. Its covering was also rough and scratchy.
The contour legacy leg pillow really does stay put all night, even when I turn from side to side. The white outer cover is smooth and comfortable, and I've found that my legs remain cool all night.
I definitely recommend this pillow for anyone dealing with lower back pain.