Clinically proven: Our Waterbase technology has been clinically proven by an independent Johns Hopkins study to reduce neck pain and improve overall quality of sleep, bringing you the best night's sleep you have ever experienced. Ideal for all sleeping positions: if you are a side, back or stomach sleeper or switch in between – the water will move with your head, so you will never have to adjust or fluff this pillow. Customise to your comfort: our Waterbased pillow can be customised to your liking. Adjust the water level for make your pillow soft, medium, firm or even medium-firm. Superior material: this pillow is made with a fully sealed and insulated water pouch with resilient polyester hollowfibre layer on top, encased in a 100% hypoallergenic cotton shell, providing exceptional comfort for the head.