Sleep comfortably with the Water Pillow. The water pillow supports your head and neck to make you sleep soundly all night. Great for helping restless sleepers. The perfect pillow! Inside this soft poly-filled hypoallergenic pillow is a waterproof Water Cushion you can fill from your tap with hot or cold water to cool your head during the summer or warm your head during the winter. You can also adjust the firmness of this luxurious pillow by simply adding to or decreasing the water fill. Water's natural buoyancy makes for the perfect sleeping environment with its gentle support. This Standard Sized pillow is like a waterbed - for your head! Please Note: Due to the possibility of health risks, this item cannot be returned.