Orthopedic knee braces provide great 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 cushion maintains the best sleeping posture all night long, and it will not 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 cotton 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 won't flatten over time. Vented Memory Foam Pillow: Unlike traditional memory foam pillows which are designed to absorb your body heat to compress, the ventilated air holes in the memory foam promote air circulation throughout the night.