High density, slow recovery, temperature sensitive foam conforms to the contours of the neck and head for maximum comfort. Visco-elastic memory foam reacts to body temperature and forms to body contours, giving proper support while maintaining softness. Use behind the head, between the knees or against the back for both comfort and support. Contour design supports all sleeping positions. Zippered, cream velour cover is removable and machine washable. Dimensions: 12" x 9" x 4".