Chiroflow® Waterbase® PillowClinically shown to reduce neck pain and improve the quality of sleepEasily adjustable to patient"s preference of soft, medium or firmExtra-plump top layer of soft, hypoallergenic DuPont polyester for outstanding comfortSecure water base responds to head movement automatically to maintain critical support for the neckThermal insulator fully encases water layer to prevent body heat lossDeluxe, 200-thread count, 100% cotton cover for extra comfort and durabilityIncludes easy-to-follow filling instructions and spoutUses ordinary tap water; does not require chemical additives20" x 28"Three-year manufacturer"s warranty and 30-day satisfaction guarantee