This lumbar pillow for sleeping is designed to help improve spine posture and help reduce strained back muscles and ligaments in the back, side, and stomach sleeping positions. Our advanced lumbar support for bed is available in 3 sizes..The height can be adjusted by adding or subtracting foam pads. The Original and Wide Lumbar products consists of two foam pads. The Super Lumbar consists of three..The top foam pad has a rounded shape that fits the natural curve of the back and allows for greater comfort. Competitive products have sharp angles that can lead to discomfort..Super-soft, machine washable outer velour cover. Medical grade memory foam offers the right balance of support and comfort..Happiness Promise - If the lumbar support you buy offers too little or too much support, please contact us directly before returning the pillow because we have options (softer and firmer) for getting you the proper amount of support without any additional charge.