Mediflow Adjustable Floating Comfort Down Alternative Waterbase PillowThe Water Pillow's Down Alternative pillow features our exclusive Responsive Support waterbase system. When combined with our new, exclusive Micro Denier Fiberfill comfort layer, you get a pillow of unsurpassed quality and performance. The down alternative floats on a thin layer of water for responsive support. The Water Pillow is clinically proven to reduce neck pain and improve quality of sleep. The Water Pillow is completely adjustable. Simply