The Water Pillow by Mediflow Floating Comfort Original Pillow - The first and original water pillow, clinically proven to reduce neck pain and improve sleep. Automatically responds to maintain support as you move during sleep Soft, cool top layer with exclusive combed loft fiberfill Can be adjusted to any firmness you prefer from soft to Extra firm Machine washable with 300 thread count cover 60 day satisfaction guaranty and 10 year warrant against defects