Pillow core: pearl cotton + buckwheat. Pillow height: 10.1-15 cm. Size: 54 * 34 * 6.5 cm. Washing instructions: can be washed directly, hand wash and machine wash are supported. Perfect dimensions: 54 * 34 * 6.5 cm, allowing you to sleep in any position, adapt to different sleeping positions and prevent you from rolling over. Its varying thicknesses provide full support for the back without leaving any gaps, which helps reduce pressure on the lumbar muscles at night and relieves pressure in the lower back. Multifunctional: this pillow can not only protect the lumbar region but can also be placed under the calf or knee for optimal comfort. It can also be used as a knee support pillow, lumbar support pillow or leg separator and is suitable for sleep, for people with lower back pain and for pregnant women. Ergonomic design - The ergonomically designed lumbar pillow fits comfortably between the waist and provides maximum support at night, relieving hip, sciatica and back pain, and keeping your legs, hips and spine perfectly aligned while you sleep.