Optimal size and softness - The knee pillow measures 14 x 10 x 5 inches. It uses slow rebound memory foam that fits the knee and leg curves. - The 4-inch extra-wide elastic straps secure the legs and prevent shifting when turning over. - More durable than ordinary fiber pillows and does not deform with long-term use. - The pillowcase is breathable, soft, and removable for easy cleaning. Comfortable support - Back sleepers: place the pillow under the knees to help maintain the natural curve of the spine, reduce the waist hanging in the air, lower lumbar pressure, and relieve back pain. - Side sleepers: the pillow helps keep the pelvis in a neutral position and reduces the burden on the spine and hip joints. Reduce joint pressure - Suitable for people with knee or hip discomfort such as arthritis or those in postoperative recovery. The pillow disperses pressure and avoids excessive joint compression. Improve blood circulation - Elevating the knees moderately promotes blood return to the lower limbs and reduces leg swelling. - This knee pillow is especially suitable for people who sit or stand for long periods or who are pregnant, and may help relieve sciatica pain. Use scenarios - Sleep with back support: place under the knees to maintain spine alignment and reduce back strain during nightly rest. - Sleep with side support: position between the legs to keep the pelvis neutral and lessen joint load while rolling onto a side. - Circumstantial relief: use during long periods of sitting or standing or during pregnancy to improve circulation and reduce swelling, and to help with knee or hip discomfort.