HEAD TO TOE SUPPORT – Inner cover: polypropylene. This generously oversized multifunctional U shape body pillow is long enough for you to stretch out and provides equal support to both sides of your body. The hour glass inner curves and contours to your entire back while aligning your hips for neutral joint positioning. Also, helps relieve pain and discomfort associated with pregnancy, sciatica, fibromyalgia, gastric reflux, lower back pain, ankle pain, and more.