Leg Spacer

You can place this unique cushion between the knees to relieve lower back
and hip pain or open it up to use for extra support under the legs. When you 
place the Tempur Pedicb leg spacer between your legs, it'll reduce
strain and stress on your back while sleeping on your side; and reduce the 
strain and stress on the back while sleeping by aligning the spine, thus
reducing the "torque" applied to the low back. As a result, this simple sleep 
aid significantly reduces pain and discomfort in the low back. The soft 
velour cover is removable for easy laundering.