Optimal size and softness: The design team has conducted extensive research on the size, hardness, and material selection of the knee pillow. The size of the body pillow is 14"×10"×5", the slow rebound memory foam fits the knee and leg curves perfectly, and the 4-inch extra-wide elastic straps fix the legs and do not shift when turning over. Our knee pillow for side sleepers is more durable than ordinary fiber pillows and does not deform after long-term use. The pillowcase is breathable, soft and removable. Comfortable support: When sleeping on your back, placing leg pillow under your knees can help maintain the natural curve of the spine, reduce the waist hanging in the air, reduce the pressure on the lumbar spine, and relieve back pain. When sleeping on your side, leg pillow for side sleeping can keep the pelvis in a neutral position and reduce the burden on the spine and hip joints. Reduce joint pressure: For people with knee or hip discomfort (such as arthritis, postoperative recovery), a knee support pillow can disperse pressure and avoid excessive compression of the joints. Improve blood circulation: Raising the knees moderately can promote blood return to the lower limbs and reduce leg swelling. Our sciatica pain relief pillow is especially suitable for people who sit or stand for a long time or pregnant women.