The ChiroFlow pillow is a patented waterbase design with 3 therapeutic layers that provides comfort and responsive support for the head and neck. A cushion of super-soft, hypo-allergenic polyester fibre rests over the water layer for all-round comfort. A thermal insulator fully encases the water layer to prevent heat loss and an easy-to-fit water pouch secured to the pillow base provides gentle, responsive support. This design responds to changes in your sleeping position and the firmness can be personalized to your preferred comfort level. It adjusts to fit your shape.