Mediflow® Waterbase Pillow Orthopedics > Neck & Back Pillows Therapeutic cervical pillow with fillable water bladder. Provides outstanding comfort and support for the head and neck. Instantly adjusts to changes in sleeping position. Reduces neck pain, relieves associated headaches, improves quality of sleep. Thermal insulator fully encases the water layer to prevent body heat from being drawn from the head, neck and shoulders. Super-soft, hypoallergenic DuPont polyester fiber top layer. Fill with tap water. Personalize for soft, medium and firm support. 2-year warranty.