Invented by a chiropractor, this is the pillow that maintains optimal cervical spine alignment in any sleeping position to reduce head and neck discomfort. Unlike typical pillows that encourage improper spinal alignment, this patented pillow has a slight depression that cradles a back sleeper's head and supports the natural curvature of the cervical vertebrae, reducing neck strain and stiffness. Two slightly elevated side surfaces maintain optimal head and neck alignment for side sleepers while two curved indentations cradle a sleeper's shoulder whether they are lying on their right or left sides. Made from two kinds of naturally hypoallergenic and antimicrobial foam, the pillow contours to the shape of the head and neck, eliminating pressure points and providing a plush, comfortable yet supportive cushion. The soft, smooth cotton and polyester cover is removable and washable. Sized for height and weight of intended user. Large: 27" L x 15 1/2" W x 5 1/2" H. (7 lbs.). Medium: 27" L x 15 1/2" W x 4 3/4" H. (4 lbs.). Small: 25" L x 14" W x 4" H. (2 1/2 lbs.)