Orthopedic knee braces provide excellent support and can dramatically improve spinal alignment, helping to relieve back, hips, legs, knees, arthritis and sciatica, as well as improving blood circulation in both legs. Elastic band design: The leg pillow maintains the best sleeping posture all night long, and it won't suddenly fall or slip. Use the right method to relieve pain in the back, hips, knees and ankles. Simply put it between the thighs or below the knees to help relieve your specific pain. It can be used as a knee retractor during pregnancy or after recovery. It is also convenient to use while traveling. This memory foam knee pillow has a washable cover for easy cleaning. Advanced High: High Density Memory Foam: 100% high quality durable memory foam, comfortable for a long time, better than other pillows. It will not flatten over time. Vented Memory Foam Pillow: Unlike traditional memory foam pillows which are designed to absorb your body heat in order to compress, the vented air holes in the memory foam promote circulation air throughout the night.