Ergonomic design. Unique ergonomically design of this lumbar support pillow meets the requirement of a healthy Lumbar Spine curvature. Lumbar keeps 26°curvature when sleeping on it. Stretch slightly and unconsciously all night. Height Adjustable lumbar back support pillow for sleeping. A removable cushion to adjust the height. With cushion, the height is 2.56 inches, which makes it be a lumbar stretcher. Lay on it half an hour, lower back pain relief and tension release. Without cushion, the height is 1.38 inches. Sleeping on it, keeps a healthy curvature all night. This lumbar support pillow for bed is made of Memory Foam, soft but provided enough support without being uncomfortable when laying on it. 23.6” width allows any posture, such as back sleeping, side sleeping, and stomach sleeping in bed without having to shift around trying to get comfortable. Widely Application. Design for side sleeper, back sleeper, stomach sleeper, Long time driver, desk workers, and even Pregnant Women. Lay on it, you will fall into sleeping easily and have a peaceful sleeping. Removable Zipper Breathable Pillowcase. Ultimate comfort and breathable, prevents overheating. Machine washable and easy cleaning. Product Size: 23.62 x 11.81 x 4.33 inches.