The Kally Knee Pillow improves the alignment of your spine while you sleep, providing you with a better quality of sleep. Ergonomically designed, the knee pillow fits comfortably between your knees and provides maximum support and comfort at night that helps relieve pain and pressure on the lower back Contoured design keeps your legs, hip and spine in ideal alignment while sleeping and improves circulation Made from high-density memory foam, the hourglass-shaped pillow offers firm support without sinking or losing shape. Breathable zip cover ensures the pillow does not get warm and is machine washable for easy cleaning. Pregnant women also benefit from a knee pillow as it helps reduce pressure in the hips and pelvis often experienced during pregnancy., , Wash pillow and cover at 40 degreeC and dry naturally on a flat surface Iron cover at a low temperature