The Chiroflow Therapeutic Waterbase Pillow is a special pillow made of hypoallergenic polyester fiber resting over a water layer for luxurious comfort. Thermal insulator surrounds the water layer to prevent heat loss. An easy-to-fill pouch provides gentle and responsive support all night long. Patients can fill this pillow with water to the consistency and firmness that they desire. This pillow is clinically shown to reduce neck pain, ease morning headaches, and improve quality of sleep. It is 20" x 28" in size and fits standard and queen size pillow. Patients who are struggling with neck pain, migraines and poor sleep report that it made a huge difference for them during the night and the next day.