Ergonomically curved knee pillows the human leg ministry line and keeps your legs, hip and spine in ideal alignment while sleeping which improves blood circulation. Our orthopedic leg pillow fits comfortably between your knees and allows leg muscles to fully relax while sleeping which helps you relieve back pain, knee pain, sciatic nerve pain, leg pain, hip, and joint pain. Made with 100% premium quality cut memory foam for long-lasting comfort for you while sleeping; Our orthopedic leg pillow with memory foam has a long life that will retain shape and will not go flat over time.