The Leg Spacer was designed to help relieve pressure and strain on the lower back, hips, knees and ankles while you sleep. The contoured design of the Leg Spacer helps the pillow move with you when you turn over, giving you uninterrupted sleep. It fits comfortably between your legs keeping them in line with the spine. This relieves pressure on the spine and nerves.The pillow is constructed with high-quality polyfoam with a variety of cover choices from a soft fleece cover to no cover at all. While lying on you side, place the Leg Spacer between your legs just above the knee. Helps relieve pressure and strain on lower back, knees and ankles. Helps relax muscles. Moves with you when you turn over. NOTE: For health and hygeine reasons this item may not be returned or exchanged once it is removed from sealed packaging. No trail periods. No exceptions.