Unlike a stack of pillows that requires constant readjustment and does not provide proper support, this is the adjustable hypoallergenic and flame retardant memory foam wedge that elevates legs to increase blood circulation which can relieve lower back pain, leg cramps, and muscle spasms. The contoured surface conforms to your leg shape for added comfort and rebounds to its original shape when not in use, ensuring it will not sag or settle. The washable cover is made of plush stretch terry knit. The support comes with a foam insert that allows you to adjust the height of the support from 5 to 9. Made in the U.S. 20 W x 24 L x 6 D. (2 lbs.).